Large engines are taxed heavily in Japan, a crowded country that offers few opportunities for speed, so don't look for a 500-horsepower Lexus anytime soon. But that doesn't mean Japanese powerplants don't pack a punch. In fact, Japan exports the engine that produces the most power for its displacement: The Honda S2000's 2.0-liter 4-cylinder makes a remarkable 240 hp without supercharging or turbocharging. It simply spins faster. Jeremy Hall, a principal engineer in Honda's engine design department, notes that the S2000's power peaks at 8,300 rpm, and the engine has a race-inspired 9,000-rpm redline. The key is meticulous engineering and production-the stress on an engine at 9,000 rpm, he says, is double that at 8,000.