Powertrain families
M60/M62 petrol V8 · M70/M73 petrol V12 · S70 high-performance V12
8 Series (E31) — Coupe
1989–1999
Editorially reviewedReviewed 2026-08-10; market and model-year scope is stated in the record sources.
- Internal code
- E31
- Production
- 1989–1999
- Body style
- 2-door coupe
- Platform
- longitudinal layout · rear-wheel drive
Body variants
8 Series → E31 → Coupe
8 Series E31: history, design and engineering
How this generation came about, what made it different and how the selected coupe fits into the family.
E31 was BMW's new technology-led flagship coupe, presented at the 1989 Frankfurt motor show and produced from May 1989 to May 1999. Although its production overlapped the end of E24, BMW positioned it higher and did not treat it as a simple direct 6 Series replacement.
The series-production tree contains one pillarless coupe body. It launched with V12 power, later added 840Ci V8 derivatives and culminated in the 850CSi with extensive BMW Motorsport development; engine family, transmission and steering-system details differ sharply among these branches.
BMW built convertible and M8 prototypes, but neither became a regular series-production body. They belong in prototype history and image galleries, not as selectable production-body routes or ordinary modification rows.
1989–1999generation lifecycle
1body branches
3engine/drive families
4range designations
E31factory code
longitudinal layout · rear-wheel drivearchitecture
Coupe: dimensions and packaging
Dimensions can change with body, market and model year, so this page keeps them tied to the exact factory branch.
Length4,780 mm
Width1,855 mm
Height1,340 mm
Wheelbase2,685 mm
Luggage320 L
Fuel tank90 L
Seats4
Doors2-door coupe
| Body | Code | Production | Doors / seats | Length | Luggage |
|---|---|---|---|---|---|
| Coupe | E31 | 1989–1999 | 2-door coupe / 4 | 4,780 mm | 320 L |
Engines and powertrains
The generation could span very different engines and drivetrains. The table keeps output, gearbox, market and production period together.
Factory modification matrix
Documented coupe applications; output and availability remain market- and model-year-specific.
| Model | Years | Engine | Output | Transmission | Drive | Market | Source |
|---|---|---|---|---|---|---|---|
| 850i | 1989–1994 | M70B50 V12 | 300 PS | 6MT / 4AT | RWD | Global range | BMW 8 Series (E31) |
| 850Ci | 1994–1999 | M73B54 V12 | 326 PS | 5AT | RWD | Global range | BMW 8 Series (E31) |
| 840Ci | 1993–1995 | M60B40 V8 | 286 PS | 6MT / 5AT | RWD | Global range | BMW 8 Series (E31) |
| 840Ci | 1995–1999 | M62B44 V8 | 286 PS | 6MT / 5AT | RWD | Global range | BMW 8 Series (E31) |
| 850CSi | 1992–1996 | S70B56 V12 | 380 PS | 6MT | RWD | Global range | BMW 8 Series (E31) |
Factory designations
840Ci · 850i · 850Ci · 850CSi
Petrol engines
Inline and V engines are grouped by engine family, displacement, induction system and emissions specification.
Diesel derivatives
Where diesels were offered, output, injection generation and emissions hardware are recorded market by market.
How power reaches the road
Gearboxes, driven wheels and final-drive hardware changed with engine, market and production date.
Transmissions
Gearbox type and unit code follow engine, market and production date. Gear count alone does not identify the transmission.
Driven wheels
Catalog architecture: longitudinal layout · rear-wheel drive. All-wheel-drive availability and hardware remain derivative-specific.
Final drive
Ratio, differential type and electronic control belong to the exact derivative and can differ on performance models.
What changed underneath
Suspension, brakes, safety systems and electronics evolved across the range, even when cars shared the same basic architecture.
Body-branch dimensions
- E31: 4,780 mm × 1,855 mm × 1,340 mm
Body & suspension
- Mounting points and geometry follow the body branch
- Springs and dampers follow axle load and chassis package
- Wheels and permitted loads follow the factory label
Brakes & steering
- Brake size follows engine and equipment
- Assistance type and steering ratio can change
- ABS/DSC generation follows model year
Passive safety
- Airbag count varies by market and year
- SRS parts are VIN-specific
- Structural repairs require factory procedures
Electronics
- Vehicle-bus generations changed during production
- Control-unit software levels must remain compatible
- Retrofits are recorded separately from factory equipment
How the generation evolved
The important launches, additions and updates did not always happen at the same time for every body or market.
Production begins
BMW Group Archive dates the start of E31 series production to May 1989.
Frankfurt premiere
The V12 850i introduced the new flagship coupe to the public at the IAA.
850CSi
The Motorsport-developed flagship added the S70-family V12 and substantial chassis changes.
840Ci V8 branch
V8 power broadened the range below the V12 derivatives.
Production ends
The sole series-production E31 coupe line ended after a ten-year factory period.
The versions that stood apart
Performance models, option packages and regional editions may look related, but their engineering and production identity can be very different.
Coupe
E318 Series E31 is a distinct E31 body branch. A lower-roof two-door body with longer doors and a more overtly sporting brief than the corresponding sedan. Engines/drive: M60/M62 petrol V8, M70/M73 petrol V12, S70 high-performance V12.
Inside the car
Cabin technology and standard equipment changed by country and year; a build sheet remains the best guide to one individual car.
Cabin & comfort
- Trim and seats follow option codes
- Climate systems vary by market
- Audio and navigation changed by model year
Lighting & assistance
- Lamp technology and modules follow production date
- Driver assistance cannot be inferred from buttons alone
- Regional rules affect lighting and warnings
What to check today
A practical starting point for inspecting and maintaining a car from this generation — not a diagnosis of an individual example.
Identify first
- Match VIN on body and documents
- Obtain the factory option list
- Confirm market and production date
Inspect the structure
- Check repairs and corrosion
- Assess suspension, brakes and tyres
- Compare fitted parts with factory specification
Mechanical history
- Read faults with compatible diagnostics
- Verify engine and transmission maintenance
- Separate invoices from unsupported verbal history
| Item | Interval / trigger | Catalog note |
|---|---|---|
| Engine oil & filter | CBS/factory schedule; time and mileage for historic cars | Oil approval follows the exact engine and market. |
| Brake fluid | Time-based factory schedule | ABS/DSC-compatible bleeding procedure is required after hydraulic work. |
| Coolant | Factory schedule and condition | Fluid specification and bleeding method are generation-specific. |
| Transmission & final drives | Unit type and operating conditions | Use the exact approved fluid; no one interval fits every derivative. |
How to identify the exact car
The badge and registration year tell only part of the story; production date, body code, engine and factory options complete it.
- Factory body codes
- E31 — Coupe
- Range designations
- 840Ci, 850i, 850Ci, 850CSi
- Powertrain families
- M60/M62 petrol V8, M70/M73 petrol V12, S70 high-performance V12
- VIN
- Identifies model, plant and production branch and keys the parts catalog and factory equipment record.
- Production date
- More useful than first-registration year when choosing parts and locating technical revisions.
- Type code
- Refines engine, body, market and transmission combination.
- Option codes
- Confirm factory equipment; later retrofits are recorded separately.
- Unit number
- Supports engine or gearbox originality checks and component applicability.
Where the information comes from
The story is mapped through English Wikipedia and its bibliography, then important dates and technical claims are checked against BMW material.
- 01BMW 8 Series (E31)Wikipedia contributors
Secondary development, engine, model and production-history overview.
- 02BMW 8 Series (E31)BMW Group Archive
Factory-archive premiere, flagship position, production boundaries and prototype context.
- 03BMW 8 Series Coupé (E31)BMW Group Archive
Factory-archive coupe body and aerodynamic development, including the 0.29 drag coefficient.
Notes and limitations
- Research revision dated 2026-08-10: English Wikipedia was used as a subject and bibliography map; key claims were checked against the listed primary BMW Group material.
- BMW Archive's May 1989 production start precedes the September public premiere and some secondary market-introduction dates; the catalog keeps those events separate.
- Convertible, M8 and 830i prototype vehicles must remain non-series annotations unless a separate prototype taxonomy is added.
- Tree years describe the worldwide generation lifecycle; individual market dates may be narrower.
- Exact dimensions, power, weight and emissions belong at body, engine, market and model-year level.
- Known-issue guidance is editorial context and never replaces inspection of the individual vehicle.
3 primary references · market differences documentedPhotography: OSX, Public domain · Wikimedia Commons. Rights checked 2026-08-06; wikimedia commons 1,800 px derivative downloaded; local 640 px and 1,280 px avif versions created without cropping.Updated 6 August 2026