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The BMW E31 is the first generation of the BMW 8 Series. It is a grand tourer built by BMW from 1990 to 1999 as a 2-door coupé, powered by either a V8 or V12 engine. Whilst it did supplant the original E24 based 6 Series in 1990, it was not a direct successor, but a new model class with a substantially higher price and performance than the 6 Series.
The BMW E31 is the first generation of the BMW 8 Series. It is a grand tourer built by BMW from 1990 to 1999 as a 2-door coupé, powered by either a V8 or V12 engine. Whilst it did supplant the original E24 based 6 Series in 1990, it was not a direct successor, but a new model class with a substantially higher price and performance than the 6 Series.
Development Development of the 8 Series began in July 1981, with the design phase reaching completion in 1986, although the launch was delayed due to still-strong 6 Series sales. The 8 Series debuted at the Frankfurt Motor Show (IAA) in early September 1989. The 8 Series was designed to move beyond the market of the original 6 Series. The 8 Series had substantially improved performance, as well as a far higher purchase price. Over 1.5 billion Deutsche Marks were spent on total development ($1.13 billion USD or €990 million in 2025). BMW used CAD tools, still unusual at the time, to design the car's all-new body. Combined with wind tunnel testing, the resulting car had a drag coefficient of Cd=0.29, a major improvement from the previous BMW M6/635CSi's 0.39. The 8 Series offered the first V12 engine mated to a 6-speed manual transmission on a road car. It was one of the first vehicles to be fitted with an electronic drive-by-wire throttle. The 8 Series was one of BMW's first cars, together with the Z1, to use a multi-link rear axle. CAD modelling allowed the 8 Series unibody to be 3 kg (6.6 lb) lighter than that of the preceding 6 Series (E24). However the production 8 Series was significantly heavier when completed due to the large engine and added luxury items—a source of criticism from those who wanted BMW to concentrate on the driving experience. Some of the car's weight may have been due to its pillar-less "hardtop" body style which lacked a "B" pillar.
Sales Sales of the 8 Series were affected by the global recession of the early 1990s, the Persian Gulf War, and energy price spikes. As a result, plans for the high performance M8 variant were dropped in 1991. BMW pulled the 8 Series from the North American market in 1997, having sold 6,920 cars. BMW continued production for other markets until 1999 having sold 30,609 in all markets. The base price for an entry-level 8 series in the early 1990s started in the US$70,000 range, which is US$172,504 in 2025.
The production totals for each model are:
840Ci with the M60 engine: 4,728 840Ci with the M62 engine: 3,075 850i / 850Ci with the M70 engine: 20,072 850Ci with the M73 engine: 1,218 850CSi with the S70 engine: 1,510
The 840Ci was offered with two different engines. The first used the 4.0-litre M60B40 V8 engine having a power output of 210 kW (286 PS) and was produced from mid-1993 to late 1995. From mid-1995, production phased in the newer 4.4-litre M62B44 V8 engine, which had better fuel economy and more torque, though power output remained unchanged. The 840Ci was available with a 5-speed automatic transmission, though European cars were given the option of a 6-speed manual transmission. The only external features distinguishing the V8 model from the V12 models were the quad round exhausts, which were square in the V12 models. The 840Ci stayed in production until May 1999.
The 850i was the first model of the 8 Series launched in 1990 with the 5.0-litre M70B50 V12 engine having a power output of 220 kW (300 PS). It was available with either a 4-speed automatic or a 6-speed manual gearbox. Around the time of the introduction of the 840Ci in Autumn 1993, the 850i was renamed the 850Ci. From October 1994, BMW installed the new M73B54 V12 engine in the 850Ci, the new engine being from the newly launched E38 750i. Thus, cars with 850Ci badging used both the M70 and M73 engines, with those built before 10/94 using the older E32-type M70. As the displacement of the M73 increased to 5.4-litres and the compression ratio went up, the power output increased to 240 kW (326 PS).
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