Was on carfolio there and did a search for the 20 fastest quater of a mile cars. And it says that a '92 caterham running a VX got the same time as an ultima??
Here

I think the standard JPE car had about 220bhp - so 400'ish bhp per tonne.

Sounds possible to me

Some JPEs had 280 bhp. They were touring car engines.

Adam

that koenigsegg crushed them all! 1.6seconds faster than number 2. i guess thats what 800bhp does for you!