They're looking at how easily they can fit into your lifestyle, covering practicality, connectivity, and ride and handling.
Oh, and what 'litres' in boot space means in real terms... featuring a cameo from 15 scatter cushions, and a Millennium Falcon.
This test features the UK's biggest selling sports car, the Mazda MX-5, the chic sister car to the Mazda, the Fiat 124 Spider, and the desirable and high quality Audi TT.
Which car will come out on top?
Find out why we're doing all this, and what The REV Test is all about.
Watch our second REV test on hybrids, featuring the Toyota Prius, Hyundai Ioniq, and Audi’s first plug-in hybrid, the A3 Sportback e-tron.