Originally Posted by PlanG

You don't need to do that.. overkill mate, they are so tiny it's unreal.

However, you can get good economy from high performance engines in large cars.

For example, a car you are probably all aware of:

The BMW 330i:

39.2MPG (UK gallons) combined cycle (
272 Hp
6.1 0-60

We do have a lot of very small cars though. For example the Suzuki Swift, Ford Fiesta, Vauxhall Corsa, Fiat Panda. Do any of these sell in the US?