Hehe, gotta be a petrol, I don't think 5th gear is long enough on the diesel to get to that speed, but since it's got a turbo timer I may be wrong. Same timer I have on mine actually.
Don't discount the D40, Mine (Auto Diesel) has been at the end off the clock also ... When I buy a new car it is almost mandatory to find out it's top speed...
The Nissan GTR (speed limiter removed) and XR8 were scary fast,,, 285 & 265 respectively
I live in Vic where there is a cop on every second corner with a hair dryer or camera pointing down the road, I have to leave the state to find maximum velocity.