The Under 250$ .21 Engines Buyers’ Guide 2010


Alpha, Dynamite, RB, Picco, Jammin’, Reedy, OS Engines, Werks, Go Engines, O’donnell, Thunder Tiger, Novarossi and Team Orion offer all great quality and affordable engine. But, finding the right engine for your budget can be complicated. There is a lot of engines on the market. Some of them cost more than 500$us. However we believe that you don’t need to spend that much money to find a high performance engine. We have listed here the most popular .21 engines you can find on the market under the 250$.

The Under 250$ .21 Engines Buyers' Guide 2010 Articles   The Under 250$ .21 Engines Buyers' Guide 2010 Articles   The Under 250$ .21 Engines Buyers' Guide 2010 Articles   The Under 250$ .21 Engines Buyers' Guide 2010 Articles

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

OFNA Picco .21B
Part Number:OFN51210
Price: 110$us

Specs and features:

  • 14mm Crankshaft
  • Hard Chromed Brass lapped liner
  • Piston CNC machined fro billet high percentage silicone alloy
  • High Quality Ball Bearings
  • Integrated Combustion Chamber
  • Composite slide carburetor
  • Capacity: 3.49 cc
  • Bore: 16.26 mm
  • Stroke: 16.80 mm
  • Horsepower: 2.1
  • RPM: 27,000
  • Weight: 330 gr

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Dynamite Mach 2 .21 SG
Part Number:DYN0897
Price: 130$us

Specs and features:

  • 13mm turbo ported crankshaft
  • 2-needle carburetor
  • ABC 6-port piston and sleeve
  • Knife edged connecting rod
  • Displacement: .21
  • Bore: 16.27mm
  • Stroke: 16.75mm
  • Engine (Only) Weight: 310 g
  • RPM Range: up to 33,000
  • HP: 2.3
  • Front Bearing Size: 7 x 19 x 6
  • Rear Bearing Size: 13 x 24 x 6
  • Cylinder Type: ABC
  • # of Ports: 6 + 1
  • Carb Type: 2-needle slide
  • Crank Type: SG

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Thunder Tiger Pro-21BX-R
Part Number:TTR9475
Price: 125$us

Specs and features:

  • Built-in recoil starter
  • Top grade CNC equipment, state-of-the-art technology are used
  • Improved mixture control carburetor; which makes adjustments simpler
  • Improved quality; ISO9001 Certified which guarantees the maximum power and performance
  • Smooth running and long lasting power plant with front and rear ball bearings
  • Dual-ball bearings, Schnuerle porting, piston and cylinder and mixture control carburetor
  • Same mounting space as the original .21 engines
  • Crankshaft is lightened, and balanced to get a fuel mixture more smoothly
  • Designed for both beginners and experienced modelers
  • Displacement: 3.49 cc. / 0.213 cu. in.
  • Bore: 16.26 mm. / 0.640 in.
  • Stroke: 16.8 mm. / 0.661 in.
  • Practical RPM: 3,000 ~ 38,000
  • Output: 2.25 BHP / 30,000 RPM
  • Weight: 390 g. wo/muffler / 13.76 oz.

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Dynamite Mach 2 .21 SG
Part Number:DYN0899
Price: 135$us

Specs and features:

  • 13mm turbo ported crankshaft
  • 2 needle carburetor
  • ABC 6 port piston and sleeve
  • Knife edged connecting rod
  • Pull start/Spin start combo equipped
  • Type: 2-stroke
  • Displacement: .21
  • Bore: 16.27mm
  • Stroke: 16.75mm
  • Engine (Only) Weight: 410g.
  • RPM Range: up to 30,000
  • HP: 2.3
  • Front Bearing Size: 7X19X6
  • Rear Bearing Size: 13X24X6
  • Cylinder Type: ABC
  • Starting System: Pull start/spin start combination system
  • # of Ports: 6+1
  • Carb Type: 2 needle slide
  • Crank Type: SG

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Losi 350 Engine
Part Number: LOSR2300
Price: 160$us

Specs and features:

  • Displacement: .21 cu in
  • Bore: 0.641 in (16.27mm)
  • Stroke: 0.659 in (16.75mm)
  • Engine (Only) Weight: 12.346 oz (350 g)
  • RPM Range: 31,000
  • Fuel: Nitro
  • Carb Type: Two-needle slide aluminum/steel
  • Crank Type: High-carbon steel, precision ground and polished with “turbo grooves”

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

OS 21VG
Part Number: OSMG2058
Price: 160$us

Specs and features:

  • ABL piston liner breaks in easier and lasts longer.
  • One-piece crankshaft is designed for rear exhaust, the preferred configuration for 1/8 scale off-roaders.
  • 2-needle carburetor is easier for beginners to adjust.
  • Wider, one-piece Tornado head uses a more affordable standard glow plug.
  • Simple, straightforward engine design makes maintenance easier and more economical.
  • Displacement:  0.211 cu in (3.46 cc)
  • Bore: 0.654 in (16.6 mm)
  • Stroke: 0.63 in (16.0 mm)
  • Practical rpm: 3,000-36,000
  • Output: 2.0 hp @ 30,000 rpm
  • Weight: 12.24 oz (347 g)

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Dynamite Platinum .21XP 9-Port
Part Number:DYNP5221
Price: 180$us

Specs and features:

  • ABC 9-port piston and sleeve for increased power
  • 14mm turbo ported and putty filled crankshaft for higher torque and horsepower
  • 3 needle carburetor with insulation ring for linear power delivery, adjustable midrange and less susceptibility to vapor lock
  • Carburetor sealing o-ring in crankcase
  • Knife-edged connecting rod for higher RPM’s and less internal turbulence

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Novarossi N21R Limited Edition
Part Number:N21RLimited
Price: 180$us

Specs and features:

  • Displacement: 3.48
  • Maximum power: 2.00 hp
  • R.P.M. (M.P.): 28,000 rpm
  • Practical Range: 6,000 – 32,800 rpm
  • Bore: 16.42 mm
  • Stroke: 16.42 mm
  • Ports: 3
  • Piston type: Die-cast
  • Crankshaft: 13mm
  • Crankshaft Type: SG
  • Glow Plug Type: Standard
  • Exhaust Type: Rear
  • Carburetor: 8mm
  • Type: Slide
  • Material: Aluminum alloy
  • Adjustment: Single

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Ofna Hyper .21 8-port
Part Number:53218
Price: 180$us

Specs and features:

  • Displacement: 3.49cc (0.21 cubic inches)
  • Bore: 16.26mm Stroke: 16.8mm
  • Horsepower: 2.7 @ 38000 RPM
  • Weight: 350g (12.3oz)
  • Carburetor opening: 15mm
  • Length: 85mm (3.355″) front of front bearing to back of pull start
  • 120mm (4.72″) pull start to end of crankshaft
  • Width: 31mm (1.21″) width neglecting the mounting flanges
  • 21mm (0.83″) mounting holes same side
  • 37mm (1.5′) mounting holes opposite side
  • Height: 113mm (4.428″) from bottom of crankcase to top of cylinder head
  • 16mm (0.63″) distance from bottom of mounting flanges to bottom of crankcase (contact Ofna for more technical information)

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

RB Concept Junior 9 Sport
Part Number:RBD01009-J9
Price: 185$us

Specs and features:

  • 3-Ports
  • Standard plug
  • 13mm crankshaft (square stroke)
  • 13mm main bearing and double rubber seal front ball bearing
  • Nylon 8mm carburetor
  • Light Off Road L2G cooling head (17g lighter)
  • Aluminum orange anodized carburetor wrist pin
  • Dust protection caps for carburetor, exhaust, fuel intake and top of the crankshaft
  • Displacement: 3.49 cc
  • Bore: 16.42mm
  • Stroke: 16.42mm
  • Porting intake: 3
  • Porting exhaust: 1
  • Crankshaft: 13mm
  • Carburetor: Slide Composite 8mm
  • Glowplug: Standard
  • Weight: 350g
  • Use: Buggy

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Alpha F850 Turbo
Part Number:21- BT5PA
Price: 200$us

Specs and features:

  • Displacement: 3.45cc
  • Bore: 16.3mm
  • Stroke: 16.8mm
  • Practical RPM: 3000-39800 RPM
  • Power output: 2.48ps @ 39800 RPM
  • Weight: 350g
  • Ports: 5
  • Sleeve: ABC
  • Crankshaft diameter: 14mm
  • Glow plug type: Turbo
  • Exhaust: Rear
  • Carburetor diameter: 8mm (Variable)
  • Case material: Aluminum
  • 3.5 cc high-performance engine for off-road buggy and truggy
  • ABC construction with 5 ports
  • Turbo combustion chamber
  • Double-needle carburetor in aluminum-plastic composite construction
  • Several venturi to the engine to adapt to the (fixed-) conditions
  • High quality ball bearings
  • Excellent handling by linear power output
  • Low fuel consumption
  • Beautiful koelkop in red
  • SG-crankshaft

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

O’Donnell Super Sport .21
Part Number:ODOG5010
Price: 200$us

Specs and features:

  • The crankcase, cylinder sleeve and piston materials are optimized for uniform expansion, which improves durability and reliability
  • 4-port ABC cylinder
  • Balanced Max-Flo crankshaft with Class 5 precision bearings
  • Machined 7075-T6 aluminum con rod with double bushings
  • Unique, compact 4-spring header attachment design
  • Features the original O’Donnell-designed “big head” machined aluminum heatsink head, dropped down low for a better CG
  • Slide valve carburetor features an aluminum body, hard anodized slide barrel, low- and high-speed needles with double O-rings on both, thermal insulating sleeve that prevents vapor lock, 7mm and 8mm restrictors
  • Includes a high-performance O’Donnell #99 glow plug
  • Excellent for both intermediates and experts

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Team Orion Alpha .21
Part Number:ORI80653
Price: 200$us

Specs and features:

  • ABC 3 port precision liner
  • 2 needle aluminum carburetor
  • High-speed ball bearings
  • Lightweight red cooling head
  • SG shaft

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Werks Racing Team Line B5
Part Number:WRXTL21B5
Price:200$us

Specs and features:

  • Stroke: 16.50mm
  • Bore: 16.30mm
  • RPM Range: 3,000 to 39,000
  • Output: 2.6ps at 33,000 rpm
  • Sleeve: Five Port, Chrome Plated Brass
  • Piston: CNC Machined High-Silicon Aluminum Alloy
  • Connecting Rod: Double bushed made with special 7075 T6 aluminum alloy
  • Carburetor: Aluminum 2 needle with adjustable venturi (7mm stock).
  • Cooling Head: CNC Machined, lightened, low CG design

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Alpha Z852 Turbo
Part Number: 21- BT52PA
Price: 210$us

Specs and features:

  • Displacement: 3.45cc
  • Bore: 16.3mm
  • Stroke: 16.8mm
  • Practical RPM: 3000-40000 RPM
  • Power output: 2.48ps @ 39800 RPM
  • Weight: 350g
  • Ports: 5+2h
  • Sleeve: ABC
  • Crankshaft diameter: 14mm
  • Glow plug type: Turbo
  • Exhaust: Rear
  • Carburetor diameter: 8mm (Variable)
  • Case material: Aluminum
  • 3.5 cc high-performance engine for off-road buggy and truggy
  • ABC construction with 5 2 bypass ports
  • Turbo combustion chamber
  • Double-needle carburetor in aluminum-plastic composite construction
  • Several venturi to the engine to adapt to the (fixed-) conditions
  • High quality ball bearings
  • Excellent handling by linear power output
  • Low fuel consumption
  • Beautiful koelkop in green
  • SG-crankshaft

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Go Technology GX-5R .21
Part Number:GOTGX-5R
Price: 215$us

Specs and features:

  • Ti-Nitride Coated crankshaft to provide smooth air/fuel flow
  • Re-Designed Piston/Sleeve with improved power band
  • Re-Designed conrod to reduce weight and turbulence
  • Re-Designed high speed needle with double O-ring seals for easier tuning and improved performance
  • Ti-Nitride coated Carburetor throttle slide
  • Ti-Nitride coated Wrist Pin to reduce friction and improve durability
  • Lightweight Cooling Head
  • Displacement: 3.45cc
  • Maximum Power: 2.6hp
  • R.P.M: 38,000 rpm
  • Practical Range: 6,000/44,000rpm
  • Bore/Stroke: 16.26mm/16.80mm
  • Ports: 5+2
  • Crankshaft: 14mm SG
  • Carburetor: 8mm
  • Glow Plug Type: Turbo
  • Exhaust Type: Rear

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Go Technology GX-7R .21
Part Number:GOTGX-7R
Price: 225$us

Specs and features:

  • Ti-Nitride Coated crankshaft to provide smooth air/fuel flow
  • Re-Designed Piston/Sleeve with improved power band
  • Re-Designed conrod to reduce weight and turbulence
  • Re-Designed high speed needle with double O-ring seals for easier tuning and improved performance
  • Ti-Nitride coated Carburetor throttle slide
  • Ti-Nitride coated Wrist Pin to reduce friction and improve durability
  • Lightweight Cooling Head
  • Displacement: 3.45cc
  • Maximum Power: 2.7hp
  • R.P.M: 40,000 rpm
  • Practical Range: 6,000/44,000rpm
  • Bore/Stroke: 16.26mm/16.80mm
  • Ports: 7+2
  • Crankshaft: 14mm SG
  • Carburetor: 8mm
  • Glow Plug Type: Turbo
  • Exhaust Type: Rear

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

OFNA Jammin JPX.21 Plus
Part Number:51250
Price: 230$us

Specs and features:

  • Displacement: 3.49cc
  • Bore: 16.26mm
  • Stroke: 16.8mm
  • Practical RPM: 3,000 – 36,000 RPM
  • Power Output: 3.0 ps / 30,000 RPM
  • Weight: 330g

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

RB Concept Killer 9
Part Number:01009-K9
Price: 230$us

Specs and features:

  • Specific crankcase with several fins for a better cooling
  • Piston/sleeve ABC 5+2 by- pass
  • Lightened conrod
  • 14mm crankshaft
  • Nylon carburetor with orange anodized venture
  • Tall drilled cooling head for improved heat dissipation and light weight
  • Provided with orange protections, RB instruction manual and stickers
  • Displacement: 3.49 cc
  • Bore: 16.20mm
  • Stroke: 17.00mm
  • Porting intake: 5+2
  • Porting exhaust: 1
  • Crankshaft: 14mm
  • Carburetor: Slide Composite 8mm
  • Glowplug: Turbo #01051-6
  • Weight: 345 Gr.
  • Use: Buggy
  • Recommended Tuned Pipe/Header: 2045P/192P, 3001P/192P, 2020USA/198P

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

RB Concept Hobby 9 Sport
Part Number:01009-H9
Price: 235$us

Specs and features:

  • 5-Ports
  • Standard plug
  • 13mm crankshaft (square stroke)
  • 13mm main bearing and double rubber seal front ball bearing
  • Nylon 8mm carburetor
  • Light Off Road L2G cooling head (17g lighter)
  • Aluminum orange anodized carburetor wrist pin
  • Dust protection caps for carburetor, exhaust, fuel intake and top of the crankshaft
  • Displacement: 3.49 cc
  • Bore: 16.42mm
  • Stroke: 16.42mm
  • Porting intake: 5
  • Porting exhaust: 1
  • Crankshaft: 13mm Turbo
  • Carburetor: Slide Composite 8mm
  • Glowplug: Standard
  • Weight: 344g
  • Use: Buggy

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Novarossi S21P5XL .21
Part Number:NVRS21P5XL
Price: 250$us

Specs and features:

  • Displacement: 3.49cc.
  • Max. Power: 2.60 Hp.
  • R.P.M (Max. power): 31,000 R.P.M.
  • Practical R.P.M Range: 6,000 – 36,200 R.P.M.
  • Bore x Stroke: 16.26mm x 16.80mm
  • Transfer Ports: 5
  • Rear Ball Bearing Type: 25.8mm – Steel
  • Crankshaft Type: 14mm SG
  • Carburetor Type: 8mm Slide
  • Material: Plastic
  • Adjustment: Single
  • Glowplug Type: Standard – C6S
  • Exhaust Position: Rear
  • Fuel Type: Advise 25% Nitro

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Werks Racing B3 Pro Ceramic
Part Number:WRXTL21B3PROC
Price: 240$us

Specs and features:

The new TL21B3-Pro utilizes as improved case design featuring additional stiffening ribs around the sleeve area to control expansion due to heat.A new long stroke design, coupled with our race proven 3-port design provides the perfect blend of strong torque and aggressive top end. The B3-Pro features much of the same factory machining normally only found in higher priced hand modified engines. This includes extensive casework improving the primary boost port as well as the transfer ports. Fuel flow is further improved on the sleeve by the teardrop machining of the transfer ports.The new B3-Pro also features a series of crankshaft alterations and combustion chamber changes. These including a new fluted crankshaft with revised timing. New combustion chamber design and new 2 needle, aluminum bodied carburetor with heat insulation shielding and replaceable venturi. All topped off with our signature black CNC machined cooling head!


The Under 250$ .21 Engines Buyers' Guide 2010 Articles

OFNA Picco .21 P7R EVO3
Part Number:OFN51216
Price: 250$us

Specs and features:

  • 14mm Crankshaft
  • 5 ports + 2 bypass
  • Hard chromed brass lapped liner
  • Piston CNC machined from billet high percentage silicone alloy
  • Swiss quality ball bearings
  • Separate large size combustion chamber insert
  • Composite slide carburetorDisplacement: 3.49 cc
  • Bore: 16.26 mm
  • Stroke: 16.80 mm
  • Horsepower: 2.3
  • RPM: 30,000
  • Weight: 330 gr

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Reedy 121VR .21
Part Number:ASC800
Price: 250$us

Specs and features:

  • 3+1 Port Chrome Plated Cylinder
  • High Silicon CNC Machined Piston
  • Knife Edged 7075 Aluminum Connecting Rod
  • Polished Turbo Scoop Crankshaft with Silicone Insert
  • Chrome Plated Back Plate with Turbo Scoop
  • Precision Ball Bearings
  • Lightweight Machined Aluminum Heatsink Head
  • Oversized Finned Turbo Head Button
  • Thermo Insulated Screw Mounted 2-Needle Carburetor
  • 7.0mm, 8.0mm, and 9.0mm Air Restrictors

The Under 250$ .21 Engines Buyers' Guide 2010 Articles

Axe Rossi Mamba X1 Evo Comp
Part Number:AXE212R21
Price: 250$us

Specs and features:

  • Ceramic Rear Ball Bearing.
  • Turbo Glow plug head button.
  • Bigger buster exhaust ports than the Standard Mamba.
  • Plastic insert in the crankshaft for the fuel/air mixture flow path optimization.
  • Crankshaft with tungsten inserts on the flywheel for balanced performance.
  • Carburetor with heat insulation prevents fuel vaporization.
  • Crankcase with a new patented intake ports system.
  • Buster exhaust system
  • Displacement: 3.5cc
  • Horse Power: 3.1 HP
  • RPM: 42500
  • Bore: 16.44 mm
  • Stroke: 16.48 mm
  • Ports: 7 + Buster Exhaust System
  • Crankshaft & Type: 14 SG
  • Glow Plug: Turbo
  • Weight: 346 gr (12.2 oz)

Sylvain Lafrance

Sylvain Lafrance

Hello, my name is Sylvain Lafrance and I am the man behind MyRCBox.com. I have bought my first hobby grade RC in the early 90s. With years, what that started as a simple hobby, quickly became a strong passion. I am so much passionate about R/C that I have created MyRCBox.com in 2006 to share my experiences with R/C products that I use for racing and bashing. Follow me !

9 thoughts on “The Under 250$ .21 Engines Buyers’ Guide 2010

  • Avatar
    February 13, 2010 at 10:12 pm
    Permalink

    You can get a V-Spec for $250, which is one of the best racing engines.

    Reply
    • admin
      February 14, 2010 at 9:20 am
      Permalink

      The OS .21VSpec is an excellent engine for sure but its street price is 300$us. Maybe you can get it at 250$ with coupons or at hobby shops in China. Our list is based on prices found at http://www.TowerHibbies.com and http://www.AMainHobbies.com

      Reply
  • Avatar
    February 15, 2010 at 3:48 pm
    Permalink

    How come no Alpha Plus engines? 3 less than $210.

    Reply
    • admin
      February 15, 2010 at 9:03 pm
      Permalink

      Hi Carlton,

      Post a link where I can use pictures, prices and specs for the Alpha engines and I’ll add them for sure.

      Thanks

      Reply
  • Avatar
    February 15, 2010 at 4:08 pm
    Permalink

    Alpha Plus engines have not even been raced for a full race season. Do you REALLY expect them to just show up as the best engine at the best price on everyone’s list??? COME ON… Let them prove themselves first huh!!!!

    Reply
  • Avatar
    February 15, 2010 at 6:24 pm
    Permalink

    Nothing in the title or description says must be out for a year or which is the BEST engine it just lists the engines UNDER $250.

    Reply
  • Avatar
    February 17, 2010 at 8:40 pm
    Permalink

    What about the SH Pro .21 engines?

    Reply

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