They're looking at how easily they can fit into your lifestyle, covering practicality, connectivity, and ride and handling.
The cars this week are the muscly Ford Mustang, the potent Porsche Boxster and amazing BMW M4.
This week, Rachael gets flung around the track by Vicki, while Erin gets a bit car sick in the back: she’s used to being in the driver’s seat.
Which 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.
Watch our third REV test on small hatchbacks, featuring 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.
Watch our fourth REV test on small SUVs, featuring the stylish and practical Hyundai Tucson, immensely popular Nissan Qashqai and Renault Kadjar, which is the sister car to the Qashqai.