Welcome to Top Gear’s 2021 Speed Week: our annual supertest of all that’s fast, fun and ever-so-slightly bizarre on four wheels. Which car makes us smile more than any other this year? Time to find out. The world of fun and fast is much more than hot hatches and supercars these days, so this year’s crop is diverse. And a little bit bonkers. We’ve got a 1,000bhp hybrid Ferrari alongside the super-serious Porsche 911 GT3. The lightest sports car money can buy – Caterham’s 170R – will duel a rally

You might remember the time Top Gear raced the RAF in a Bugatti Veyron. Well, technology has moved on a little since then, and Paddy McGuinness fancied a rematch, so join Chris Harris in the super-slippery, 250mph McLaren Speedtail and the RAF in their 1200mph F35 jet for another head to head... | Top Gear