I've had my S70 (2.5 20v) reading an indicated 145mph (on an airfield, I hasten to add!). I realise that's not going to be completely accurate, but I'm thinking Car magazine must have had a duff car if they could barely go any faster with a snail strapped to the side! An original 855 T5 supposedly did ~180mph with the speed limiter removed on the test track, although they eventually wound the boost down a bit for the production versions.
As for the 440 twin turbo conversion....it's not that crazy an idea. There's very little space for a single larger turbo in a 400 (space being the usual reason for multiple turbos), and ethanol will give better detonation suppression than petrol. Sounds like an interesting car, if it's for real...although with the the sort of power on tap that that car would have with that hardware setup, I'd expect more than 160 would be possible with the right gearing.
cheers
James
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