Head 2 Head

It's sibling rivalry time. Jonny Lieberman heads to the American southwest in Utah with two of the best convertibles money can buy -- the Audi R8 Spyder and the Porsche 911 Carrera S Cabriolet.

Two of England's most-prestigious brands duke it out.

Motor Trend's Mike Febbo pits two tuner cars against each other. In one corner, the BMW 335i loaded with a BMW M performance kit and aftermarket options. In the opposing corner, the Cadillac ATS tuned by D3.

Motor Trend's Jonny Lieberman referees the battle between two hotly anticipated Japanese sports sedans -- the 2014 Infiniti Q50S and the 2014 Lexus IS 350.

Jonny Lieberman pits two of the very coolest station wagons in the world against each other.

Carlos Lago and Randy Pobst restage the annual Best Driver's Car competition with this year's winning Porsche 911 Carrera 4S.

Jonny Lieberman pits an American icon against itself. Banks Engineering has added more sophisticated turbocharging as well as revised, active suspension. But is it that much better than the regular production Humvee?

Jonny Lieberman is joined by Mike Shaffer and two extremely potent hyper sedans -- the 2014 BMW M5 Competition and the 2014 Mercedes-Benz E63 AMG S Model.

The Lexus GS 350 F Sport faces off against the Cadillac CTS Vsport.

Jonny Lieberman heads to Graz, Austria, the home of one of the world's toughest off-roaders -- the Mercedes-Benz G-Wagen.

Kim Reynolds re-enacts the Battle of Britain by pitting the Union Jack's two great luxury names again each other. It's Bentley versus Rolls-Royce!

Carlos Lago pits two great Britons against each other -- the Aston Martin V12 Vantage S and the Jaguar XKR-S GT.