The official combined economy figure is 134.5mpg, with CO2 emissions of 49g/km:a world away from the V8 which puts out about 245g/km...... Real world it will probably manage 60mpg, which is a big improvement on 25....!
I reckon thats optimistics as certainly is the 49g/km 35/40 mpg is more like it -its a big car, moving it about takes energy and no way has engine efficiency even in F1 improved by more than a third if that.
But I reckon MMC would be missing a trick if they simply stuffed into the Aero the engine from an eco box big saloon. Better the engine from something sporty like the M3 or even the M1. And they already have links with Ford so how about one of their small block sporty V8s
