BMW's new S1000RR superbike is proof that good things come in small packages. Its one-liter four-cylinder engine develops 193 hp at 13,000 rpm (the motor redlines at 14,200 rpm), thanks to a compact design and radically oversquare bore-to-stroke relationship (meaning the piston diameter is greater than the stroke). That's more power than the Yamaha R1 and about the same output as the 1.3-liter Suzuki Hayabusa. Light finger followers—technology borrowed directly from Formula 1—operate the enormoustitanium valves, dramatically reducing reciprocating mass. Watch them in action in the video above.
