[ovrtaxt]

GM and Chrysler do this already. They call it ‘variable displacement’.

I almost bought an Impala SS last year, with a V8 that gets 28 mpg due to this idea. But the fact that I didn’t want automatic transmission and front wheel drive on a car hat calls itself an SS sunk the deal. I got a Mustang GT instead.

[Eric in the Ozarks]

Someone told me the V-8 Impala was a clumsy piece of work. FWD with more power than can be put to its wheels is rather pointless.