Watch the Koenigsegg One:1 hit a top speed of 240 mph (384 km/h). For this attempt, the Koenigsegg One:1 was running on E85 biofuel and it had WEC LMP1 racing driver Oliver Webb at the wheel. The Koenigsegg One:1 hides under its hood a massive 5.0-liter V8 biturbo engine that's good for 1,322 hp and 1,011 lb-ft of torque.