Dyno shootout: Audi TT RS vs BMW M2 vs Porsche Cayman S

- We took the BMW M2 (pictured), Audi TT RS and Porsche 718 Cayman S to be weighed and dyno tested for our next video group test. Here's a gallery of the behind-the-scenes action. Come back on Friday for the full video feature.

- #BMW #M2 #Audi #TTRS #TT #Porsche #718 #Cayman

- The BMW's turbocharged straight-six sounded awesome firing at max revs around the dyno testing room.

- It takes lots of cameramen to shoot footage of me, Road Test Editor, Vicky Parrott, pointing at a screen.

- There are a lot of naked GT-Rs around the Litchfield garage.

- We get weights and front/rear weight bias for our mega tests. Unsurprisingly, the mid-engined Porsche proved light and perfectly balanced.

- The Porsche 718 Cayman S has a new turbocharged four-cylinder motor. Despite the engine's strengths, we still miss the old six-pot.

- The Audi TT RS is the most powerful of our three coupes, by a big margin – in both claimed and real-world figures.

- #Audi #TT #RS #BMW #M2 #Porsche #718 #Cayman #track #shootout #group #gallery

- The five-cylinder Audi sounds boomy and menacing even in light use, but it makes a raucous noise on the dyno.

- Wouldn't want to get the TT's seat dirty...

- Photography by Alex Tapley