This is the original FIA homologation form for the E30 BMW 325i, A-5292. Homologation papers are the official record of a car as built, and they decide what may be raced and which competition parts are allowed. The form was issued by the FISA through the German ONS and was valid in Group A from 1 February 1986.
The scan runs to 40 pages: the 16-page base form plus twelve extensions added between 1986 and 1992. Those cover extra final drives, competition brakes, centre-lock wheels, roll cages and the facelift. The original form is bilingual German/English, and everything below is taken from the English parts.
| 2,494 ccM20 straight six, Bosch Motronic | 84 × 75 mmBore × stroke, max bore 84.1 mm | 1 Feb 1986Valid from, Group A | 12Extensions, 1986 to 1992 |
Highlights
- Getrag 5-speed with a 3.64:1 final drive, plus 16 more final drive ratios from 2.93 to 5.44:1 added by extension
- A homologated close-ratio dog-leg gearbox with a 2.31 first gear
- Competition parts: 5-lug hubs, centre-lock wheels, 4-piston aluminium calipers, vented discs up to 330 mm, twin master cylinders with a balance bar, and 15.5:1 steering
- The 4-door body is homologated as an option, and the 1988 update adds the facelift car and a 64 litre fuel tank
- Aluminium roll cages were homologated in 1986 and cancelled in 1992
The homologation form (PDF, 40 pages)
The scan is OCR’d, so you can search the text inside the viewer.
Base form: definitions and dimensions
| Homologation no. / group | A-5292, Group A (form for Group A/B) |
| Valid from | 1 February 1986 |
| Manufacturer / model | BMW 325i |
| Construction | Unitary, steel |
| Volumes / seats | 3 / 5 |
| Overall length | 4,325 mm ±1% |
| Overall width | 1,645 mm ±1% (measured at the rear wheel arch) |
| Body width at front / rear axle | 1,632 / 1,640 mm |
| Wheelbase, right / left | 2,570 / 2,570 mm |
| Overhang, front / rear | 759 / 996 mm |
| Height above front / rear seats | 985 / 935 mm |
| Width at front / rear seats | 1,345 / 1,380 mm |
| Steering wheel to brake pedal (F) | 650 mm |
| Steering wheel to rear bulkhead (G) | 1,482 mm |
| H = F + G | 2,132 mm |
Engine
| Location | Front, inclined 20° to the right |
| Cycle / supercharging | 4-stroke / none |
| Cylinders / cooling | 6 in line / liquid |
| Capacity per cylinder / total | 415.6 cc / 2,494 cc |
| Maximum capacity allowed | 2,499.7 cc (not for Group N) |
| Bore (max allowed) / stroke | 84 mm (84.1 mm) / 75 mm |
| Block | Cast iron, no sleeves |
| Connecting rods | Steel, divided big end, 48 mm big-end bore, 135 mm centres (±0.1 mm), minimum 650 g |
| Crankshaft | One-piece forged steel, 7 plain main bearings of 60 mm, cast-iron caps, minimum 21,500 g |
| Flywheel | Steel, minimum 8,420 g with starter ring |
| Cylinder head | 1, aluminium, 45° between the valves |
| Fuel injection | Bosch Motronic, electronic, air-volume metering, 60 ±0.25 mm throttle, 6 injectors in the inlet manifold |
| Camshaft | 1, in the head, toothed-belt drive, 7 bearings, rocker arms |
| Max valve lift, inlet / exhaust | 10.25 / 10.25 mm (at 0.25 mm clearance) |
| Inlet | Aluminium manifold, 1 element; 1 valve per cylinder, 42 mm, 7 mm stem, 102.5 ±0.5 mm long, double coil springs |
| Exhaust | Cast-iron manifold, 2 elements; 1 valve per cylinder, 36 mm, 7 mm stem, 102.5 ±0.5 mm long, double coil springs |
| Ignition | Battery, 1 plug per cylinder, 1 distributor |
| Lubrication | Wet sump, 1 oil pump |
| Fuel tank | 1, sheet steel, under the rear seat (outside), 55 litres (64 litres from 1988) |
| Batteries | 1 |
Drivetrain
| Driven wheels | Rear |
| Clutch | Mechanical, single plate |
| Gearbox | Getrag manual, behind the engine, lever on the transmission tunnel |
| Final drive | Hypoid, 3.64:1 (40:11) |
| Propshaft | 2-piece, with guibo disc, universal joint and centre bearing |
All forward gears are synchromesh. The standard box has the normal pattern with reverse at top left. The additional box is a dog-leg: reverse at top left, 1st at bottom left, then 2-3 and 4-5.
| Gear | Standard box | Teeth | Additional box | Teeth |
|---|---|---|---|---|
| 1 | 3.830 | 41:14 | 2.31 | 32:15 |
| 2 | 2.199 | 37:22 | 1.685 | 28:18 |
| 3 | 1.401 | 30:28 | 1.378 | 28:22 |
| 4 | 1.000 | – | 1.17 | 26:24 |
| 5 | 0.810 | 26:42 | 1.00 | – |
| Reverse | 3.456 | 21:37, 14:21 | 2.74 | 38:15 |
| Constant | 1.308 | 34:26 | 1.08 | 26:24 |
Suspension, brakes and steering
| Front / rear suspension | Single-joint struts / semi-trailing arms |
| Springs | Coil springs front and rear (no leaf springs or torsion bars) |
| Shock absorbers | 1 per wheel, telescopic, hydraulic |
| Wheels | 14 in (355.6 mm) front and rear |
| Braking system | Hydraulic, 1 tandem master cylinder (2 × 20.64 mm), ATE Mastervac servo, brake regulator in the engine bay |
| Wheel cylinders, front / rear | 1 × 48 mm / 1 × 33 mm |
| Calipers | Cast iron, 1 per wheel, 2 pads |
| Front discs | 260 × 22 mm, ventilated; pad area 258.4 / 160 mm diameter, pad length 92 mm, 646.72 cm² per wheel |
| Rear discs | 258 × 10 mm, solid; pad area 256.4 / 190.8 mm diameter, pad length 75 mm, 460.82 cm² per wheel |
| Parking brake | Cable, lever between the front seats, rear wheels |
| Steering | Rack and pinion, 21.4:1, power assisted |
Bodywork
| Doors / tailgate | 2 (4 as an option, ext. 01/01) / none |
| Doors, bonnet, boot lid, body | Sheet steel |
| Windscreen | Laminated glass |
| Rear and side windows | Safety glass |
| Bumpers | Sheet steel and rubber |
| Ventilation / heating | Yes / yes |
| Sunroof | Optional sliding/lift roof, hand crank or electric |
| Front side windows | Hand crank or electric |
Extensions
The letters after each number give the type: VO option variant, ES sporting evolution, ET normal evolution, ER erratum.
| Ext. | Valid from | What it adds |
|---|---|---|
| 01/01 VO | 1 Feb 1986 | 4-door body, with front and rear doors in sheet steel. |
| 02/02 VO | 1 Feb 1986 | Final drives: 2.93, 3.07, 3.15, 3.25, 3.46, 3.73, 3.91, 4.10 and 4.27:1 Driveline: reinforced rear driveshafts Suspension: reinforced front and rear with 5 wheel bolts (interchangeable with the original parts), adjustable strut top mounts, centre-lock wheels front and rear Brakes: twin master cylinders (15.9, 17.78, 19.05 or 22.23 mm) with no servo or regulator, balance bar adjustable from the gearbox tunnel, 4-piston aluminium calipers (front 44.45/41.3 mm, rear 31.75 mm), vented discs front 304 or 315 × 27.9 mm and rear 302 × 19.8 mm Steering: 15.5:1 |
| 03/03 VO | 1 Feb 1986 | Reinforced front wishbones, front anti-roll bar mounting and rear shock mounting. |
| 04/04 VO | 1 Feb 1986 | Aluminium roll cage by rubi Schweißtechnik u. Motorsport GmbH (Kirchheim/Teck), AlZn4.5Mg1 tube 40 × 3.0 mm, 25 kg with fixings. |
| 05/05 VO | 1 Apr 1986 | Suspension: adjustable top mount, anti-roll bar mounting on the strut, reinforced drive flange for the centre lock Calipers: aluminium 4-piston rear (38.1 mm), aluminium 4-piston front (2 × 26 + 2 × 30 mm, or 2 × 38.1 + 2 × 41.3 mm) Discs: vented, front 304 × 27.9 or 280 × 20.7 mm, rear 302 × 19.8 or 280 × 20.7 mm, plus a 330 × 28 mm front disc |
| 06/01 ES | 1 Jul 1986 | Modified plastic front spoiler. Not valid for rallies. |
| 07/06 VO | 1 Jul 1986 | Aluminium roll cage by Winfried Matter GmbH (Graben-Neudorf), AlZn4.5Mg1 tube 40 × 3.5 mm, 37.0 kg with fixings. Groups A and N. |
| 08/07 VO | 1 Jul 1986 | Reinforced rear suspension. |
| 09/01 ER | 1 Mar 1987 | Correction to 08/07: the spring position is changed. |
| 10/08 VO | 1 Apr 1988 | More final drives: 4.45, 4.56, 4.67, 4.75, 5.00, 5.28 and 5.44:1. |
| 11/01 ET | 1 Apr 1988 | New photos of the facelift car and a 64 litre fuel tank. |
| 12/02 ER | 1 Jan 1992 | Aluminium and light-alloy roll cages (04/04 and 07/06) are no longer homologated. |
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