Introduced in September 1963, the BMW 1800 was the second member of the New Class family.
This model had an M10 engine with an 84 mm (3.3 in) bore and 80 mm (3.1 in) stroke, giving a displacement of 1,773 cc.
It produced 67 kW (90 hp) at 5,250 rpm and 130 N⋅m (96 lb⋅ft) at 3,000 rpm.

The 1800 TI (Turismo Internazionale) model featured components developed for the 1800 by the tuning company Alpina.
The upgrades included dual Solex PHH side-draft carburetors and higher-compression pistons for 82 kW (110 hp) at 5,800 rpm and 136 N⋅m (100 lb⋅ft) at 4,000 rpm.

A homologation special, the 1800 TI/SA, was introduced in 1964.
The TI/SA's engine had dual Weber DCOE-45 carburetors and a 10.5:1 compression ratio.
This engine produced 97 kW (130 hp) at 6,100 rpm and 144 N⋅m (106 lb⋅ft) at 5,250 rpm.
The TI/SA also had a Getrag five-speed gearbox, stronger anti-roll bars, and larger-diameter brake discs than the TI.
200 examples of the TI/SA were built and were only sold to licensed racing and sports drivers.

An automatic transmission option was introduced in 1966 and in 1967 the 1800 was generally updated along with the 2000.
The updates included interior changes (a modernized dashboard design and simpler door panels) as well as styling changes to the front grilles.

In 1968 the 1,773 cc engine used in the 1800 was replaced by an engine with the 89 mm (3.5 in) bore of the 2.0 L engine and the original 71 mm (2.8 in) stroke, which resulted in a displacement of 1,766 cc and a stroke/bore ratio of 0.798:1 (compared with the previous 1800 engine's ratio of 0.952:1).
Introduced in September 1963, the BMW 1800 was the second member of the New Class family. This model had an M10 engine with an 84 mm (3.3 in) bore and 80 mm (3.1 in) stroke, giving a displacement of 1,773 cc. It produced 67 kW (90 hp) at 5,250 rpm and 130 N⋅m (96 lb⋅ft) at 3,000 rpm.
The 1800 TI (Turismo Internazionale) model featured components developed for the 1800 by the tuning company Alpina. The upgrades included dual Solex PHH side-draft carburetors and higher-compression pistons for 82 kW (110 hp) at 5,800 rpm and 136 N⋅m (100 lb⋅ft) at 4,000 rpm.
A homologation special, the 1800 TI/SA, was introduced in 1964. The TI/SA's engine had dual Weber DCOE-45 carburetors and a 10.5:1 compression ratio. This engine produced 97 kW (130 hp) at 6,100 rpm and 144 N⋅m (106 lb⋅ft) at 5,250 rpm. The TI/SA also had a Getrag five-speed gearbox, stronger anti-roll bars, and larger-diameter brake discs than the TI. 200 examples of the TI/SA were built and were only sold to licensed racing and sports drivers.
An automatic transmission option was introduced in 1966 and in 1967 the 1800 was generally updated along with the 2000. The updates included interior changes (a modernized dashboard design and simpler door panels) as well as styling changes to the front grilles.
In 1968 the 1,773 cc engine used in the 1800 was replaced by an engine with the 89 mm (3.5 in) bore of the 2.0 L engine and the original 71 mm (2.8 in) stroke, which resulted in a displacement of 1,766 cc and a stroke/bore ratio of 0.798:1 (compared with the previous 1800 engine's ratio of 0.952:1).
BMW New Class