We tested four cars - a Ford Focus, Renault Clio, Toyota RAVA and Audi A4 - at the Motor Industry Research Association (Mira) testing facility in Nuneaton, Warwickshire.
Each car was brake tested at 70mph with 3.0mm depth tyre treads and then with the legal minimum 1.6mm depth tyre treads. The difference between the two results shocked and surprised us...
For the full story see the 5-11 July issue of Auto Express magazine.
Watch Porsche's lightweight, more-powerful Boxster strutting its stuff on stunning mountain roads above.
Ferrari's sensational new 458 supercar has finally hit the road, see it here in action for the first time, plus, don't miss our exclusive verdict.
Watch Renault's quartet of battery-powered concepts rolling around town above.
Watch and listen to Mercedes' all-new retro-rocket as it stretches its legs in front of the camera
Watch the hottest Scirocco and Golf side by side and on the move for the first time
See the brand new Vauxhall Astra in action and then read our full verdict on how it fares against the competition.
See the stylish new Ibiza Cupra Bocanegra in action as it heads from SEAT's high-tech factory in Barcelona to the stunning sight that is the Solucar solar power station outside Seville.
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