with hotter engines

11:35 Oct 7, 2014 

There are two meanings for "hotter" with regard to engines.

The first one is that modern engines literally run physically hotter. Engines are more efficient when they are running hot and leaner (less fuel) mixtures burn hotter. Aerodynamic styling also reduces air flow under the hood and therefore cooling of the engine.

However, there is a second, more slang, meaning that a hot engine is a tuned engine that produces a lot of power relative to it's size. Unfortunately, this is also true of modern engines.

I suspect that the first meaning is the one intended here but I'm not sure enough to give an answer.