2023 Porsche 911 GT3 Touring

4.0L NA Flat-6

4.0L Naturally Aspirated Flat-6

One of the last great high-revving naturally aspirated engines, it spins toward 9,000 rpm with a hard, metallic shriek and a linear, throttle-faithful power delivery that turbocharged rivals can't replicate.

Built in Stuttgart by Porsche; the 718 versions evolved from the 9A2 EVO architecture (itself derived from the 992 Carrera's turbo flat-six) while the 911 GT3's 4.0 traces a separate race-bred motorsport lineage.

• The 718 Spyder RS and GT3 share displacement and a screaming character but are not the same engine family under the skin.
• The 4.0-liter naturally aspirated flat-six is among the largest-displacement six-cylinders fitted to any modern production car.
• The 718 Spyder RS version peaks at 9,000 rpm, an exotic redline more associated with bikes than road cars.