About BMW 3 Series (E30)
Cars
The BMW E30 is a compact executive car which was produced by BMW from 1982 to 1991. Rust protection was improved with the update.
All variants used a rear-wheel-drive layout with the exception of the all-wheel-drive 325iX. The BMW M3 was first introduced on the E30 platform. The E30 was released in 1982 and was replaced by the BMW E36 in 1992. BMW continued to produce the cabriolet (convertible) E30 well into 1992 and the Touring until June 1993. The cars were powered by a range of inline 4-cylinder and inline 6-cylinder eng
ines. The E30 BMW M3 was fitted with a high-revving 4-cylinder petrol engine (BMW S14) which produced 175 kW (238 PS; 235 hp) in its final European-only iteration. Body styles
The E30 3-series was penned by Claus Luthe in 1978, the designer of the NSU Ro 80. It was produced as four- and two-door saloons (with the latter often referred to as a "coupé"), two-door convertible (the M3 cabriolet was only offered for the European market), cabriolet by Baur, and a five-door estate (marketed as the "Touring"). The BMW M3 utilised a widened and heavily redesigned variation of the two-door body style. The M3 shares few body parts with other E30 models; however, many M3 parts can be used on the other body styles and are interchangeable offering the consumer an OEM upgrade. Production history
Initial release (1982)
Externally, the appearance is very similar to the E21 predecessor, however there are various detail changes in styling to the E30. Major changes over the E21 include interior features and revised suspension (to reduce the oversteer which the E21 was criticised for). The primary distinctive feature of the BMW E30 models produced for the North American market in 1984–1987 are the elongated front/rear aluminum bumpers. These bumpers are commonly known as "diving boards." Minor update (1985)
This update included changes to exterior and interior trim. The 323i model was replaced with the 325e at this time. This was also when the diesel-engined 324d was introduced. Major update (1987)
At Frankfurt in September 1987, BMW introduced a major update to the E30 (often called "Series 2"). The changes to the lineup were the addition of the touring (station wagon) variant and removal of the 325e model. The M10 4-cylinder engine was replaced by the M40. External styling changes included a new front bumper, redesigned rear lights, rear apron, headlight reflectors, and licence plate frame, while the window frames lost their chrome trim. Various mechanical changes were made, including updating of the engine range. In 1988, the anodized aluminum bumpers for the North American market were shortened by revising the cover/fillers and shortening the shocks. In 1989 (again, for North America) the chrome plated steel bumpers were replaced with shorter plastic bumpers in body-colour. In the rest of the world the 1987 facelift changes remained largely unchanged until the end of production. Engines
BMW E30 325i Engine
1990–1991 BMW 318is (E30) 2-door coupe (Australia)
1988–1990 BMW 320i (E30) convertible (Australia)
1991-1992 E30 Touring
Following on from the E21, at the launch of the E30 range in 1982 it was fitted with the M10 straight-four and the M20 straight-six engines. Over the production run, the M10 was replaced with the M40 and M42, the M20 received various upgrades and the BMW S14 engine was introduced in the M3. A six-cylinder diesel was also introduced later, originally only in naturally aspirated form. Four-cylinder
At the launch of the E30 range in 1982, the 316 used a 1766 cc M10 fed by a carburetor and producing 66 kW (90 PS; 89 hp), this engine allowed BMW to offer a cheap, entry-level car in the range. The 318i had the same M10 engine, but with Jetronic fuel injection, pushing power to 77 kW (105 PS; 103 hp) while also improving fuel economy. The 1987 "Series 2" update introduced a new four-cylinder SOHC engine, the 1796 cc (M40B18) with 85 kW (116 PS; 114 hp). This engine incorporated Motronic fuel injection, hydraulic valves adjusters and a belt-driven cam. The 316 was replaced by the 316i, which used a 1596 cc M40B16, producing 75 kW (102 PS; 101 hp). This was not quite as torquey as the 66 kW (90 PS; 89 hp) 1766 cc M10 it replaced - nevertheless, it offered superior performance overall. In South Africa and perhaps some other markets, the old M10-powered 316 continued until 1991, gaining the new bumpers when the range was updated. The 316i model (and previous 316 model) was not sold in Australia, where the base model continued to be the 318i. The 318iS coupe was released in 1989, soon followed by the 318i sedan and 318iC convertible. These models introduced a new engine, the chain-driven DOHC M42 1.8 L 16-valve engine w. This is the most modern engine available in the E30 range, incorporating the updated Bosch Motronic 1.3, hydraulic valve adjusters and four individual coil packs which resulted in a very high hp per liter as well as reasonable fuel economy (33mpg) and CO2 emissions (190 g/km). The excellent weight distribution of the 318iS has led to frequent comparisons with the famous E30 M3. Nicknames include "mini M3" or "poor man's M3." The M3 is powered by the BMW S14 engine, a high-revving motorsport engine. Six-cylinder
At the launch of the E30 range, the 320i (2.0 L M20 with 92 kW (125 PS; 123 hp)) and 323i (2.3 L M20 with 105 kW (143 PS; 141 hp)) were available, both using Bosch L-Jetronic fuel injection. These models were not sold in North America, presumably for emissions reasons. In 1985, the 323i was replaced with a 2.5 L version of the M20, which produced 126 kW (169 hp) and used Bosch Motronic fuel injection. This engine was available in the 325i variants (including the all-wheel drive 325iX). An economy version called the 325e (the e signifying efficiency) was released as a lower revving, more fuel efficient engine. To maximise low-rev torque, the engine was the largest available in the chassis (aside from the rare South African version which was available with the 3.2 L M30). The 2.7 L had a longer stroke than the 2.5 L, with a more restrictive head, four cam bearings instead of seven (less internal friction), and single valve springs where the 2.5l had doubled up springs. This resulted in 122 kW (166 PS; 164 hp) at 4250 rpm and, more importantly, 240 N·m (180 lb·ft) at 3250 rpm (peak torque for a 325i is 215 N·m (159 lb·ft) at 4000 rpm). The 1987 "Series 2" update boosted the 320i to 95 kW (129 PS; 127 hp) and the 325i to 126 kW (171 PS; 169 hp) and improved fuel economy. Diesel
When introduced in 1985, the 324d was somewhat of a surprise for usually sporting BMW. The 2443 cc inline-six only produced 86 PS (63 kW), and with a higher weight than the rest of the lineup performance was less than scintillating. Help was on the way though, and in 1987 a turbocharged version called the 324td with 116 PS (85 kW) arrived. This model also had an all-new electronically controlled injection pump (DDE) developed by Bosch, which provided higher power and smoother running. While the 324d continued to be available in a few markets, most importers chose to focus on the faster 324td. Drivetrain
1991 BMW 325iX 2-door (US)
In total, eight transmissions were available for the various models of the E30: five manuals, and three automatics. Manual transmissions
The standard gearbox for the 316 and some 318i models is the Getrag 220 4-speed, these models had the option of the 5-speed Getrag 240. The Getrag 220 does not have synchromesh on reverse. The 5-speed 318i models use the Getrag 240 gearbox. This gearbox is also used on the 320i, however with a different bell housing to suit the M20 engine. The 323i and 325i use the stronger Getrag 260 5-speed. It is suggested that the 323i may have had a sports manual as an option. Some European market facelift M20 cars (320i and 325i) were also available with a ZF manual transmission, however this was not a listed option, or specific to any particular market or factory, and is thus very rare to find. The M3 was fitted with a Getrag 265 five-speed manual gearbox. This featured a dogleg shift pattern for European models and a standard H-pattern for North American models. Automatic transmissions
Both automatic transmissions were manufactured by ZF - they were the 3-speed 3 HP 22, which was available on the M10 316 and 318i models until year 1985, and the 4-speed 4 HP 22, which was available on all models later. 320i and 325i have the option of the sport automatic, that was an electronic box rather than the usual fully mechanical box. This is much less common to find in USA than Euro market cars, though it is still fairly uncommon in Euro market cars too. Transmission gear ratios
4-speed manual 5-speed manual 3-speed automatic 4-speed automatic
available on 316, 318i 316, 316i, 318i(s), 320i 323i standard, 325i 323i sports 316, 318i 320i, 323i 325i
1st 3.76 3.72 3.83 3.76 2.48 2.73 2.48
2nd 2.04 2.02 2.20 2.33 1.48 1.56 1.48
3rd 1.32 1.32 1.40 1.61 1.00 1.00 1.00
4th 1.00 1.00 1.00 1.23 - 0.73 0.73
5th - 0.81 0.81 1.00 - - -
reverse 4.10 3.45 3.46 4.10 2.09 2.09 2.09
Differentials
There were many differentials used on the E30 models. The 316 and 318i shared a differential, as did the 320i and 323i, with the standard transmission. 323i models with sports transmissions had a different differential. The 325i received its own ratio, as did the 325e. The various M3s had special ratios as well. In some markets, L*D differentials were optional for all models (there are cases of 316i and 318i cars with L*D).