Take a Lotus Elise (weighing only 1,975-lbs in US specification) and then add a 420 bhp 2.7-liter twin-turbo V6 engine from Audi and you have the insanely fast Lotus Esthi from Brandes & Dschüdow.
The modified car weighs just under 2,200-lbs so it has a power to weight ratio equivalent to a 996 Turbo with ~700 bhp.
Brandes & Dschüdow – Makers of the Esthi.