Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

Only if he runs at full power all the time. Most cars most of the time would be fine with just 20kW of drive power. Also, the 75% of fuel energy which never makes it to the crankshaft is a mix of noise, exhaust gas thermal & kinetic energy and heat rejection from the casing and the cooling system, so you'd need a ton of heat recovery equipment to get it all back.

Is that a metric fuck-tonne?