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 904
The Bergspyder is powered by the air-cooled 2-liter eight-cylinder boxer engine used in the type 771. This engine had its first use in 1962 in the Porsche 718 RS 61 [21] and already had a Bosch injection system for mixture preparation. The valves were operated by two overhead camshafts with vertical shaft drive. The engine delivered up to 191 kW (260 hp) at 8,800 rpm and had a compression ratio of 10.5: 1. The car a top speed of around 260 km/h (161 mph).
Modern day replicas of the 904 are currently being produced by a number of companies, including Martin and Walker in the UK and Chuck Beck in the US.