Jaguar’s supercar-rivalling XE SV Project 8 has confirmed its status as the world’s fastest four-door car by setting a new track record.

The 600 horsepower, 321kph four-door road-legal saloon lapped the 2.238-mile WeatherTech Raceway Laguna Seca in 1min 37.54sec — almost a second faster than the previous production sedan record — with racing driver Randy Pobst at the wheel.

The most extreme Jaguar yet produced, XE SV Project 8 is a saloon with genuine supercar performance. Jaguar Land Rover Special Vehicle Operations engineers fine-tuned the car on some of the world’s most thrilling test tracks, including Germany’s famed Nürburgring Nordschleife. Late last year, the XE SV Project 8 lapped the 12.9-mile circuit in a record 7min 21.23sec.

Michael van der Sande, Jaguar Land Rover Special Operations Managing Director, said: “This Laguna Seca lap record is another powerful demonstration of the Jaguar XE SV Project 8’s performance credentials.”

Each of the 300 hand-built Project 8 cars are modified at the SV Technical Centre in Coventry to accommodate the specially tuned, supercharged 5.0-litre V8 engine and a bespoke rear differential. Unlike most high-performance production saloons, the all-wheel-drive XE SV Project 8 is studded with genuine motor racing technology such as F1-style ceramic wheel bearings, adjustable ride height and adjustable camber. The front and rear fenders are bespoke to accommodate larger, wider, wheels which are necessitated by the larger brakes.