BMW E30 M3 S14 2.5 Racing Modifed

The BMW E30 is a compact executive car which was produced by BMW from 1982 to 1993. 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 engines. 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

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.[9] 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 . 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 & 318ic 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 90.22 kW (123 PS; 121 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
In 1985, BMW introduced the 324d, which used a 2443 cc diesel inline-six that produced 86 PS (63 kW). 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.