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BMW tuners - ALPINA

ALPINA C1 / B6 E21

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Alpina
's range took off where many others would finish, with a modified version of the BMW 323i. The engine was the standard overhead camshaft in-line six with the compression ratio lifted from 9.5:1 to 10:1. With special pistons and a re-worked cylinder-head which housed a new camshaft, it produced 125 kW (170 hp at 6000 rpm instead of 105 kW (143 hp at 5800).


1978-1983 BMW Alpina C1 / B6 E21 technical specifications
Type
C1 2.3 (based on 323i E21)
B6 2.8 Type I (based on 323i E21)
B6 2.8 Type II (based on 323i E21)
Engine
Code
M20 B23
M30 B28LE (M86)
M30 B28LE (M86)
Displacement
2316cc
2788cc
2788cc
Cylinders
6
6
6
Fuel type
Gasoline
Gasoline
Gasoline
Power
125kW | 170HP
147kW | 200HP
160kW | 218HP
Torque@RPM
210Nm@4500rpm
248Nm@-rpm
265Nm@5000rpm
Performance
Top Speed
208km/h | 129mph
222km/h | 138mph
229km/h | 142mph
Acceleration
0-100km/h
0-60mph
7.9s
7.2s
7.0s
Fuel Consumption (l/100km | mpg)
City
13.9 | 16.9
13.8 | 17.0
13.8 | 17.0
Highway
8.1 | 29.0
8.9 | 26.4
8.9 | 26.4
Combined
11.0 | 21.3
11.3 | 20.8
11.3 | 20.8

Dimensions
Length
4355mm
Width (without exterior rear-view mirrors)
1610mm
Height
1380mm

General
Units produced
462
324
209
Period built
4/1980-7/1983
11/1978-8/1981
9/1981-1/1983

Maximum revs went up to 7000 from 6400. Torque was lifted from the original 190 Nm (140 Ib-ft) to 210 Nm (154.7 Ib-ft) at 4500 rpm. Alpina also offered a series of kits which could further improve the car's performance and/or reliability. Chief among these was an oilcooler; a 96-litre fuel tank; 255 mm diameter ventilated disc brakes; special suspension equipment using variable rate springs and Bilstein gas-filled shocks; light alloy rims, 6 inches wide at the front carrying Pirelli P7 195/50 VR 15 tyres and 7 inches wide with 205/50 VR 1 5 P7 tyres at the rear; front and rear spoilers; a special Alpina fascia panel; bucket seats; and the distinctive Alpina colour scheme. The Alpina BMW C1 retained the Bosch K-Jetronic fuel injection system and had a claimed top speed of 208 km/h (129 mph), with acceleration figures of 7.9 sec for 0 to 100 km/h (62 mph) and 28.9 sec for a standing start kilometre.

Jean Claude Giroix Alpina C1

Like all Alpina conversions, the car was officially homologated and fuel consumption was given as 6.1 litres/100 km (46.3 miles/Imperial gallon). A variation on the C1 was offered by the Alpina importer for France, Jean Claude Giroix, whose "JCG" model boasted cleaned-up pistons, valves, and valveseats, a modified camshaft, and a sports exhaust manifold. Figures for the JCG version were 127 kW (173 hp at 6600 rpm and 228 Nm (168 Ib-ft) at 4500 rpm, with a top speed of 213 km/h (132 mph).

Alpina B6: BMW 328i

The second car in the Alpina range, the B6, took the form of a 3-series body fitted with the 2.8-litre engine of the 528i model - modified of course. The 2788-cc six-cylinder engine was tuned along the traditional Alpina lines and retained the Bosch L-Jetronic fuel injection of the production model. It utilized an AFT digital map electronic ignition system. Power output was 160 kW (218 hp at 6000 rpm as against 135 kW (184 hp at 5800 rpm for the standard 2.8i engine. Torque was 265 Nm (195.3 Ib-ft) at 5000 rpm compared with 235 Nm (173.2 Ib-ft) at 4200 rpm. Driving through a manual five-speed box and a 3.45 axle, this gives the B6 a 0 to 100 km/h (62 mph) figure of 7 sec and a time of 27.2 sec for the standing kilometre. Top speed is around the 230 km/h (143 mph) mark. Naturally, the B6 was not just modified in the engine department. Other modifications included improved suspension, Pirelli P7 tyres, front and rear spoilers, a 96-litre tank, and Alpina trim items inside and out.

Source: BMW Alpina Press Release

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