Based on the Porsche 911 GT3, the Ruf RGT was introduced in 2000. Inspired by the 1973 Porsche Carrera RS, the Ruf RGT combines light weight with a powerful engine to provide impressive performance. Acceleration of the original 3.6L version was 0-60 mph in 4.6 seconds, with a top speed of . When the new generation of 911 GT3 debuted, Ruf bored out the 3.6L engine to , modified the exhaust and catalytic converters, and replaced the ECU and air filter. The new power output was , which resulted in decreasing the 0-60 mph time from 4.6 to 4.2 seconds (or even 4.1, according to some sources), and increasing top speed by 7 mph (to 317 km/h).
Both engines are coupled to 6-speed manual transmissions.
The car's appearance is also changed, utilizing a bodykit which includes a polyurethane front air dam and carbon fibre doors, mirrors, engine lid, and spoiler, all of which reduce the car's weight to . The car is fitted with 19 inch Ruf Supperleggera wheels and Michelin Pilot Sport Cup tires.
Finally, the RGT is customized with interior trim of the customer's choice, including Recaro seats and the deletion of unnecessary parts to save weight.