The RPE RP-V8 engine is a very high-power, lightweight V8 racing engine. The RP has been continuously developed since 2004 and is fully race-proven, with over 160 units manufactured to date. Amongst many successes, the RP unit has been used by Radical Sportscars to smash the Nürburgring Nordschleife Production Car Lap Record, first in 2005 and again in 2009.

The RP-V8 Macroblock engine comprises Suzuki GSX-R Hayabusa cylinder heads, mounted to a dedicated dry-sump crankcase. A flat-plane steel billet crankshaft transmits power to the gearbox, while a gear drive rotates the Formula One-specification scavenge pumps, twin oil supply pumps and the coolant pump.

The RP range of engines are available in various capacities from 2.6 to 3.2 litres. The 2011 specification RPX 2.7 litre and RPC 3.2 litre variants incorporate all-new 2011 Suzuki GSX-R 1340cc cylinder head technology, while the 2.7 also includes brand-new RPE developed tuned inlets.

The Radical Performance Engines RP Series V8 was featured in issue No. 037 Race Engine Technology magazine. Please click here to view the article.

Note: All power figures below account for ram air effect and transmission losses recorded on RPE's rolling road.

RPA 2.6
Max power 380bhp
Max torque 215 lb/ft
Max revs 10,500rpm
Bore 81mm
Stroke 63mm
Compression ratio 11.0:1
RPX 2.7
Max power 430bhp
Max torque 260lb/ft
Max revs 10,500rpm
Bore 81mm
Stroke 65mm
Compression ratio 12.5:1
RPB 2.8
Max power 460bhp
Max torque 250lb/ft
Max revs 10,500rpm
Bore 84mm
Stroke 63mm
Compression ratio 13.5:1
RPC 3.2
Max power 500bhp
Max torque 320lb/ft
Max revs 10,500rpm
Bore 84mm
Stroke 71.5mm
Compression ratio 13.5:1

STANDARD ENGINE SPECIFICATION 

  • 72° V8 cylinder, 32-valve quad-cam 
  • Steel flat plane crankshaft incorporates a high flow-rate oil system 
  • Twin pump lubrication system 
  • Four scavenge pump dry sump system 
  • Rotary vane coolant pump 
  • Pre-engaged starter motor 
  • Belt-driven 45-amp alternator 
  • 45mm eight-throttle body induction system
optional engine upgrades
The Radical Performance Engines RP-V8 optional engine upgrades are listed below:

  • Race ported and polished cylinder heads with +1mm valve seats
  • Billet camshafts and adjustable valve timing
  • One-piece stainless steel race valves
  • High-strength roller cam chains
  • Cosworth high compression two-ring pistons
  • Oversized-billet cylinder barrels with Nikasil bores
  • Heavy-duty ARP cylinder studs
  • Arrow high-strength forged steel conrods
  • Long-stroke crank with uprated flywheel flange and fasteners
engine dimensions
  • Length: 546mm
  • Width: 513mm
  • Height: 440mm
  • Dry Weight: 88kg (194lb)


RPE MACROBLOCK V8

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Radical Performance Engines RPB 2.8
RADICAL PERFORMANCE ENGINES RPB 2.8
Radical Performance Engines RP-V8 overhead view
RADICAL PERFORMANCE ENGINES RP-V8 OVERHEAD VIEW
The RP-V8 is manufactured in-house
THE RP-V8 IS MANUFACTURED IN-HOUSE
Radical Performance Engines RP-V8 dry-sump lubrication detail
RADICAL PERFORMANCE ENGINES RP-V8 DRY-SUMP LUBRICATION DETAIL
Radical Performance Engines RPC 3.2
RADICAL PERFORMANCE ENGINES RPC 3.2
Each engine is carefully assembled by hand
EACH ENGINE IS CAREFULLY ASSEMBLED BY HAND