A ride up the famous Goodwood hillclimb with racing legend Rene Arnoux is not something you turn down.

Especially so today, given that he's driving the 320bhp Renault Twin'Run concept. With a V6 in the back and a six-speed sequential racing gearbox, the Twin'Run is never likely to make it into series production. Parts of it, however, like the modular digital dashboard, are said to echo the styling of the next Renault Twingo.

A typically jam-packed Goodwood schedule means we're running late getting down to the start line. A perfect chance for Rene to make up some time by giving it the beans, then. He doesn't need asking twice, and the Twin'Run certainly has plenty of beans to put down.

Down at the start line, we join the queue of supercars waiting to prove themselves on the famous course. Oddly, the Twin'Run's styling doesn't look out of place here, and a few blips of the V6's throttle by Rene quickly halt any rumblings that the Renault's place is anywhere but here.

I'm reminded of my trip to Le Mans a few weeks back, sitting in a traffic jam of rare and powerful exotica. We've got the GTA Spano in front - and as it screams off the line, we edge forward for our turn.

The marshall's hand comes down; just a few seconds to go. Rene builds the revs and the V6 shouts its reply behind us. Up goes the Marshall's hand, and we jump from the line.

First gear lasts only a few moments before we're into second and tearing up the first straight. Rene's keeping a keen eye on the state of all the car's internal sensors thanks to the in-built digital dashboard. Crowds line every inch of this iconic course, and I spot several hundred camera flashes as we go by.

Past Goodwood House and we're very nearly into triple digits. The Twin'Run just keeps going, and Rene shows no sign of lifting his foot from the accelerator. Under the main gantry and I spot the 300ft warning board for the hillclimb's main, and toughest, left-hander. We go past it at full pelt. I get nervous.

The 200ft board goes past in a similarly brisk fashion. I tense up.

As the 100ft warning board hoves into view, I wonder if I should say something to Rene, but then we finally brake and I get the full benefit of the Twin'Run's four racing-spec disc brakes.