That is 103.5 horsepower per liter. that is like my brother's Honda Accord with 227.7 horsepower!! (currently at 110). wow BMW engines pack so much power into the size of their engines. The new Corvette ZR1 is considered Chevy's most powerful engine (the LS9) which has 100 hp/L (620 hp, 6.2L), and that is a supercharged engine! and BMW does better with natural aspiration! crazy.