Not sure about the Griffth's but the cerbera's are pretty safe you have a sort of roll cage built in its mainly there though to stop the flexing thou ,but here is a cerbera after a heavy side impact we don’t have that sort of reinforcing inside of a supra door.
"deformation in an accident is very different to that of a conventional monocoque car. Anecdotal evidence suggests that TVRs are very strong in frontal impacts.
Steve Barber crashed his Cerbera back in January. Steve recalls the events:
"We were travelling down a straight country A-road at around 60mph ish... when I moved slightly closer to the nearside as I was slightly spooked by an oncoming car. As soon as the car started moving I just seemed to lose all control. After a few yards the nearside front caught a telegraph pole which sent us sideways. We then proceeded in a sideways direction performing a very neat 30m hedge clearance until the rear three quarter struck a fence post and the driver's door struck a small tree.
After everything came to a stop I switched off the engine and lights (those that were left intact!) and we extracted ourselves from the car. Unfortunately my side was now full of prickly hedge, but at least we were relatively unharmed. I do, however, feel that it was a very safe car to crash in. Even the salvage guys commented that in a 'normal' car, we would have been lucky to get out without serious injuries."