The latest Techart Magnum is full of carbon fiber and packs a 930-horsepower punch. There are plenty of tuners ready to sell you a tweaked Porsche Cayenne. Techart has done just that for years ...

Still, despite knowing the sort of power that can be extracted from modern turbocharged engines it’s no less surprising to see a Boxster with damned near 400bhp. TechArt has taken the 2.5-litre ...