Top-level rally cars in the WRC are currently restricted to just 1.6 liters. Here is a look at VW's reigning double championship-winning turbo four-cylinder.
This little engine puts out an incredible 313 horsepower at 6250 rpm and 317 lb-ft of torque at 5000 rpm (VW's official figures are 318 PS and 430Nm). This is with a 33mm restrictor on the air intake, too.
It's incredible how much power these WRC cars can produce from so little displacement, with so much response (thanks to anti-lag keeping the turbocharger perpetually spooled) and with so much reliability.
There's more information on these engines on VW Motorsport's own website, and if you're interested go right here.
Photo Credits: VW