the point is that at 70mph that little engine is having to drag a HUGE amount of car around with no assistance (the battery runs out of power). however you've got to remember that in day to day driving the peak power is nearer that of a normal 2l hatch (not a sporty one or owt, but a normal one), which is a lot better than most other things in the states. it does a lot better round town than most other cars, but on average its still beaten by smallish diesel hatches (the lupo tdi does ~70mpg on a run.. madness)