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The Integra Type R features an advanced 1.8-liter, 195-horsepower, dual overhead cam, 16-valve inline 4-cylinder engine equipped with the Variable Valve Timing and Lift Electronic Control (VTEC) system pioneered in the Acura NSX.
Its additional horsepower, which is 25 more than the 170-horsepower Acura Integra GS-R, is the result of key technological achievements such as:
- High-compression, low-friction pistons;
- High-performance camshafts and valve gear;
- Larger throttle body and single-port intake manifold;
- Hand-polished intake and exhaust ports;
- High-volume induction and exhaust system.
The engine also features Programmed Fuel Injection (PGM-FI), a highly rigid crankshaft with eight full balance weights, a crankshaft reinforcing bridge, an oil cooling system and oil jet piston cooling, twin-spring intake and exhaust valves, a highly rigid integrated aluminum die-cast engine stiffener, and a number of other technologies to increase performance while maintaining reliability and durability, along with smooth operation.
To get the most out of the engine's added horsepower, the Type R also features a close-ratio, 5-speed manual transmission and a new limited slip differential. The development emphasis was placed on dramatically increasing performance at high rpm. This emphasis resulted in an engine with a significantly different character than the Integra GS-R, further reinforcing the Type R's image of a limited production, ultra-high performance sports coupe.
Putting out 195 horsepower at 8000 rpm, and 130 lbs-ft of torque at 7300 rpm, the Type R engine is the most powerful normally aspirated mass-produced automobile engine per liter ever produced (108 horsepower per liter) for the United States. And its relatively long stroke and high redline give it the highest piston speed of any automobile engine in the world, even faster than the legendary World Championship Honda Formula One and IndyCar engines.
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