RUF Builds The Boxer-Eight Engine Porsche Always Kept Off The Streets

While most of the industry pours its R&D budgets into batteries and hybrid systems, RUF has gone the opposite direction and engineered something almost nobody builds anymore: an all-new, high-output combustion engine from scratch. The German tuner-turned-manufacturer just unveiled its B8, a 4.8-liter twin-turbo flat-eight, at the Goodwood Festival of Speed, and it's a configuration that has essentially no modern equivalent on public roads. That's notable because Porsche, the brand most associated with boxer engines, never gave the flat-eight layout to a street car despite using it extensively on track for decades.

RUF has effectively picked up a thread Porsche left dangling, developing its own version of an engine format that's historically been reserved for prototype racers rather than anything customers could actually buy and drive home. The numbers RUF is quoting put the B8 in genuine hypercar territory: over 1,000 hp and 738 lb-ft (1,000 Nm) of torque, entirely without electrification. That's enough to trade blows with the hybrid-boosted Lamborghini Revuelto, except RUF's engine gets there on turbocharged air alone.

Just as unusual is what's bolted to the back of it — a six-speed manual gearbox, also built in-house, at a moment when manual transmissions are nearly extinct in cars with this kind of output. For its Goodwood debut, the B8 has been dropped into a modified CTR3 prototype, a car that blends a reworked 911 front end with a bespoke Multimatic tubular steel rear chassis. Fitting the larger engine required stretching the prototype nearly four inches longer than a standard CTR3, though from the outside there's little to give away the transplant — RUF carried over much of the CTR3 Evo's bodywork, including its engine cover, bumpers, and exhaust tips.

The one giveaway is the paint: a black-and-yellow scheme paying tribute to the brand's iconic CTR Yellowbird, and it's race driver Tanner Foust, formerly of Top Gear USA, running the car up the hill all weekend. Company founder Alois Ruf framed the engine as more than just a horsepower flex, calling the B8 a defining moment for the brand's future and noting that a production boxer-eight, in this form, has never existed anywhere in the industry before. It's a bold claim, but given how rare it's become for any manufacturer to launch a genuinely new performance engine rather than warm over an existing one, it's hard to argue with.

What RUF hasn't confirmed yet is exactly when — or in what production model — the B8 will actually reach customers. The CTR3 prototype is clearly a testbed rather than a preview of the finished car, but the engineering work behind it suggests RUF is serious about building a road car around this engine rather than treating it as a one-off show piece. For a company that's spent decades reworking Porsche's platforms, having its own from-scratch flat-eight could mark a genuine turning point.