The Viper would hammer both, the Lotus has beaten the F355 but not by much a margin. And to add more into your tweaking the turbos on an Esprit, these people have:
http://members.home.net/shokwave/performance.htm
On a '98 Esprit V8. I emailed the guy and he said that he got 0-60 in 3.4 seconds and around 450bhp on it after doing the modifications he specified on his site. Very interesting!
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- Lotus -
For The Few Who Know The Difference