Screw top speeds. The real test for production cars is which one can lap the Nordschleife quickest. The record is obviously held by a race car, one of the Porsche 956s (Bellof), but I believe the quickest road car to have graced it's twisty turns is a modified Porsche 911 GT2.
Some of the old Porsche 956s that Bell and Ickx drove at Le Mans would hit 240mph down the Mulsanne Straight. I have the video "In-car 956" and as you may have guessed, it is packed with video footage onboard with Derrick Bell taking you round the Nordschleife, Spa, Brands Hatch, Kyalami, and of course - Le Mans. The speed is terrifying as he sprints down the Mulsanne Straight.
The 1500bhp Porsche 917/30 Can-Ams could peak at 250mph. Wow.
HISTORIC BTCC VIDEOS