My favorite toy was the green Porsche 935, similar to this one:

Porsche 935 was introduced in 1976 as the representative of the Group 5, where it competed against the cars such as BMW 3.0 CSL, M1, Stratos Turbo, Beta Montecarlo or the Ferrari 512BB LM.

Mechanically speaking, it was the evolution of the Porsche 911 Turbo.

If we trust the factory sources [2], although they have the tendency not to speak the truth, the data say following:

Year of Construction: 1977
Class: Group 5
Engine: Boxer biturbo 6 cylindres
Displacement: 2 857 cm³
Power: 630 ch (463 kW)
Mass: 970 kg
Top Speed : 366 km/h
First Victory: World Championship in 1977
Drivers: Jacky Ickx, Jochen Mass

For the next year, Porsche made better aerodynamics and provided more power:

Displacement: 3 211 cm³
Power: 845 ch (463 kW)
Mass: 1025 kg
Top Speed : 366 km/h
Drivers: Rolf Stommelen, Manfred Schurti

According to the rules of the aerodynamics, the air behind the vehicle makes the most of the drag, because the low-pressure zone is forming there if the cut is too steep. Due to that reason, LeMans cars tend to have long rear end.

Besides the Green car, fixed for the races by the Kramer Company (Known as K2, K3, K4) I also had the red one. This 935 was from 1977, Customer Edition [3]: