It is based on the Lotus Evora, however the Buletta team took it apart and created the RF22 from it. They change some parts with as a result a 1.353 kilo car and added a 3.5 liter V8 engine with supercharger. This offers the possibility of accelerating to 100 kph in just 3.6 seconds. These will be available starting 2014 on a made-to-order basis.
Source: http://www.sprhuman.com