Porsche 919 Hybrid
Porsche revealed an evolution of the 919 Hybrid on 11 April 2018, as it broke the lap record in Circuit de Spa-Francorchamps with a lap time of 1:41.77, with Neel Jani behind the wheel. The lap time was 0.783 seconds faster than Lewis Hamilton's flying qualification lap in 2017, previously posting a 1:42.553 in his Mercedes AMG F1 W08, a Formula One car. Jani was also over 12 seconds faster than the standard 919 Hybrid's 2017 pole position lap time of 1:54.097. During the lap, Jani's speed trap was at the Kemmel Straight, with an average speed of .
Porsche 944
For the 1986 model year, Porsche introduced the 944 Turbo, known internally as the 951. The Turbo had a turbocharged and intercooled version of the standard 944's engine that generated ( in the US) at 6,000 rpm. In 1987, "Car and Driver" tested the 944 Turbo and achieved a time of 5.9 seconds. The Turbo was the first Porsche production car utilising a ceramic port liner to retain exhaust gas temperature along with new forged pistons and was also the first vehicle to produce identical power output with or without a catalytic converter. The Turbo also featured several other changes, such as improved aerodynamics, notably an integrated front bumper. This featured the widest turn signals (indicators) fitted to any production car, a strengthened gearbox with a different final drive ratio, standard external oil coolers for both the engine and transmission, standard 16 inch wheels (optional forged Fuchs wheels), and a slightly stiffer suspension (progressive springs) to handle the extra weight. The Turbo's front and rear brakes were borrowed from the Porsche 911, with Brembo 4-piston fixed calipers and 12-inch discs. ABS also came standard. Engine component revisions, more than thirty in all, were made to the 951 to compensate for increased internal loads and heat.
Changes occurred for the 1987 model year. Interior wise, the North American variant of the 1987 944 Turbo became the first production car in the world to be equipped with driver and passenger side air bags as standard equipment. A low oil level light was added to the dash as well as a speedometer as opposed to the speedometer on the 1986 model year cars. Also included was the deletion of the transmission oil cooler, and a change in suspension control arms to reduce the car's scrub radius. The engine remained the same M44/51 inline-4 as in the 1986 model.