Martin Brundle and daughter Charlie team up on 860hp Porsche 911 Turbo

Production of the Brundle Edition Turbo is capped at five cars. Martin Brundle and his daughter Charlie have teamed up with Californian company Gunther Werks on the 860hp project, which is based on the company's reworked Porsche 911 Turbo.

The power unit is a rear-mounted 4.0-litre twin-turbocharged flat-six, delivering 860hp and 610lb-ft of torque. A six-speed manual gearbox drives the rear wheels.

Charlie, a car designer with experience at McLaren, Aston Martin and Jaguar Land Rover, led the design. Martin helped shape the car's driving characteristics, including its Sport and Track settings. In the announcement, Brundle said his daughter's role made the project deeply personal.

The specification includes an adjustable rear wing, front canards, carbon ceramic Brembo brakes and forged magnesium wheels bearing the Brundle name. The two-tone pearl paint takes inspiration from Martin's racing helmet; Charlie also designed the MB monogram on the headrests.

Brundle says the car remains civilised and usable on public roads despite its extreme performance. Buyers will receive a matching Bell HP77 helmet, signed by Brundle and certified for race use. The car is due to be shown to the public at the Concours at Wynn Las Vegas.