They're looking at how easily they can fit into your lifestyle, covering practicality, connectivity, and ride and handling.
This week, the competition is fierce, and it's a three in three for cars with rear wind-down windows!
This test features three big hitters: the UK's biggest selling car ever, the Ford Fiesta; a serious contender for the Fiesta crown, the Seat Ibiza; and the Vauxhall Corsa, which will be getting an upgrade next year.
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 first REV test on small sports cars featuring the Mazda MX-5, Fiat 124 Spider, and Audi TT.
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.