Unusually, three different layouts of the six-cylinder engine remain in favour: the straight-six, the V6 and the flat-six. When it’s bad though... it can be a gritty, painful-on-the-ear misery.

A pair of turbos were strapped to a Porsche-derived 3.6-liter flat-six engine, with 580 hp and 505 lb-ft as the result. Partly due to the minimal weight carried by the CTR2, this relatively small ...

He named it the contra engine two for how the cylinders worked in contrast. The name didn't stick, but the engine did. The flat-twin ... while a straight six employs six vertical (or nearly ...

More than five million miles of development driving have taken place to create this new flat-six engine and its design was a clean-sheet process. There’s no belt drive or starter motor ...

Under the hood lies a naturally aspirated 4.0-liter flat-six engine that delivers 411 hp and 310 lb-ft (420 Nm) of torque, screaming all the way up to 7,500 rpm. Sure, a factory-fresh Porsche GT3 ...

which moved to flat-four turbos in 2017. Well, most of the lineup: last year saw the Cayman GT4 and Boxster Spyder bring back six-cylinder power. The new GTS 4.0 models share their engines with ...