The third generation of the Audi 100 was the generation that lost its wagon version. Instead of a traditional station wagon, Audi offered a sort of hatchback, naming it the Avant. It was built on the same technical platform as the rest of the lineup, but the entire rear part of the vehicle's bodywork was changed. The demand for classic station wagon vehicles on the upper market was not in high demand, but sometimes more trunk space was appreciated, and Audi gave a smart answer with this fastback bodywork. The total trunk space was 390 liters (13.7 cu-ft) with the rear seats up and it could be extended up to 1310 liters (46.3 cu ft). The interior room was enough for five adult passengers. A great innovation for the year it was launched was the fully galvanized body, and that made it rust-resistant. The 10 years anti-rust warranty was also a good proof of quality. Another interesting innovation for the vehicle was the quattro all-wheel-drive system and the procon-ten protection system in case of an accident. The pneumatically controlled central locking system relied on vacuum rather than electric actuators. The entry level engine was a 1.8-liter unit while the top model was a 2.3-liter unit turbocharged. An automatic transmission was offered as an option.