ATS D4 car-by-car histories
This model is eligible for the Grand Prix de Monaco Historique 2018, in Race G: Formula 1, 1977 to 1980, with ground-effects, Cosworth DFV engine.
Like many early 1980 cars, the ATS D4 looked very much like a Williams FW07. Gustav Brunner and Tim Wardrup were credited with the design, with was lighter, shorter and narrower than the ATS D3.
ATS had a free-wheeling attitude to type numbers, and had started 1980 with a pair of cars, one of which was new, which they described as being D4s. The first of these was a modified version of the D3 introduced the previous autumn, and the second was its brand new twin. These were used in South America and most publications called them D3s, but it appears that the team were calling them D4s. However, ATS then introduced a new model at the South African GP which was also called the D4. This new car was described as being outwardly similar to previous ATSs, but with a completely new monocoque. It was three inches shorter and the front track was 1½ inches narrower, but the suspension design was unchanged. So we must really regard the two cars used in South America as updated D3s, and the South African GP car as the first D4. Unfortunately, the new car did not last long; new driver Marc Surer was trying really hard in the first practice session, vigorously pumping the D4's fading brakes, when his foot slipped off the brake pedal, and the car ploughed into the bank. The front of the D4 folded up and it took 45 minutes to extract Surer, who had badly broken ankles.
Jan Lammers was brought in to replace Surer, and he had a new D4 for Long Beach which had revised skirts and sidepods. The young Dutchman astonished everyone by putting the car on the second row of the grid, only for a driveshaft to fail after a single lap. A third D4, further modified and lighter, was ready for the Monaco GP, but Lammers qualified the older car. After losing a number of laps in the pits, he drove a gritty race, overtaking one of the Ferraris at one stage. Using the lighter D4/3, he set ninth fastest time in practice for the Spanish GP, and ran in sixth place before the inevitable retirement. Surer then returned and took over D4/3, generally qualifying between somewhere 11th and 17th, but his races were never untroubled and finishes were rare. After receiving concussion when he wrote off D4/2 in a testing accident at Silverstone in August, Surer seemed to lose his way, and qualified ever further back, failing to make the grid at all in Canada.
The two surviving D4s were retained for early 1981 for the returning Lammers before the new D5 was introduced at the Monaco GP. Due to ATS's numbering system, it is possible that the chassis plates used by ATS on these cars were offset by two from the numbers used here, so D4/1 would have been plated "D4/3" and so on.
(1 Mar 1980)
(30 Mar 1980)
(1 Jun 1980)
(14 Sep 1980)
Please contact Allen Brown (email@example.com) if you can add anything to our understanding of these cars.