Powertrain families
ALPINA B4 twin-turbo inline-six · ALPINA D4 twin-turbo diesel inline-six
B4 / D4 (F32/F33) — Coupe
2014–2020
Editorially reviewedReviewed 2026-08-10; market and model-year scope is stated in the record sources.
- Internal code
- ALPINA B4/D4 F32 Coupé
- Production
- 2014–2020
- Body style
- 2-door coupe
- Platform
- longitudinal layout · rear- or all-wheel drive
Body variants
B4 / D4 → F32/F33 → Coupe
B4 / D4 F32/F33: history, design and engineering
How this generation came about, what made it different and how the selected coupe fits into the family.
F32/F33 inaugurated B4/D4 naming for ALPINA versions of BMW's newly separated 4 Series. B4 Bi-Turbo and B4 S used petrol six-cylinder power, while D4 Bi-Turbo offered a diesel coupé/cabriolet programme depending on market.
Coupé and retractable-hardtop Cabriolet have different mass, luggage and performance. B4 S, Edition 99 and market-specific all-wheel-drive cars need independent dates and hardware, while edition colours should inherit the correct mechanical base.
These cars share technology with F30/F31 B3/D3 but not catalog identity. Racing B6 GT3 and the later G26 Gran Coupé are separate branches.
2014–2020generation lifecycle
2body branches
2engine/drive families
4range designations
F32/F33factory code
longitudinal layout · rear- or all-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.
Length4,638 mm
Width1,825 mm
Height1,370 mm
Wheelbase2,810 mm
Luggage445 L
Fuel tank60 L
Seats4
Doors2-door coupe
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 |
|---|---|---|---|---|---|---|---|
| B4 Bi-Turbo | 2014–2017 | ALPINA N55 3.0 L twin-turbo inline-six | 410 PS | 8AT Switch-Tronic | RWD / AWD | Global range | BMW 4 Series F32/F33: ALPINA model history |
| B4 S Bi-Turbo | 2017–2020 | ALPINA N55 3.0 L twin-turbo inline-six | 440 PS | 8AT Switch-Tronic | RWD / AWD | Global range | BMW 4 Series F32/F33: ALPINA model history |
| B4 S Edition 99 | 2018–2019 | ALPINA N55 3.0 L twin-turbo inline-six | 452 PS | 8AT Switch-Tronic | RWD / AWD | Global range | BMW 4 Series F32/F33: ALPINA model history |
| D4 Bi-Turbo | 2014–2018 | ALPINA N57 3.0 L twin-turbo diesel inline-six | 350 PS | 8AT Switch-Tronic | RWD / AWD | Europe | BMW 4 Series F32/F33: ALPINA model history |
Factory designations
B4 Bi-Turbo · B4 S Bi-Turbo · B4 S Edition 99 · D4 Bi-Turbo
High-performance powertrain
Engine, cooling, exhaust, software and transmission form a distinct M or ALPINA specification rather than an option package on the base model.
Diesel derivatives
Where diesels were offered, output, injection generation and emissions hardware are recorded market by market.
Electrification
Mild- and plug-in hybrids are separate derivatives; combustion-engine output must not be substituted for total system output.
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- or all-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
- ALPINA B4/D4 F32 Coupé: 4,638 mm × 1,825 mm × 1,370 mm
- ALPINA B4 F33 Cabriolet: 4,638 mm × 1,825 mm × 1,384 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.
First B4
B4 Bi-Turbo Coupé and Cabriolet established the new line.
D4 diesel branch
Selected markets received the high-performance diesel alternative.
B4 S
Higher output and technical revisions advanced the petrol range.
Edition 99 and end
A limited edition preceded the close of F32/F33 ALPINA production.
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
ALPINA B4/D4 F32 CoupéB4 / D4 ALPINA B4/D4 F32 Coupé is a distinct F32/F33 body branch. A lower-roof two-door body with longer doors and a more overtly sporting brief than the corresponding sedan. Engines/drive: ALPINA B4 twin-turbo inline-six, ALPINA D4 twin-turbo diesel inline-six.
Cabriolet
ALPINA B4 F33 CabrioletB4 / D4 ALPINA B4 F33 Cabriolet is a distinct F32/F33 body branch. An open body with a folding roof and generation-specific structural reinforcement, seating and luggage packaging. Engines/drive: ALPINA B4 twin-turbo inline-six, ALPINA D4 twin-turbo diesel inline-six.
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
- ALPINA B4/D4 F32 Coupé — Coupe; ALPINA B4 F33 Cabriolet — Cabriolet
- Range designations
- B4 Bi-Turbo, B4 S Bi-Turbo, B4 S Edition 99, D4 Bi-Turbo
- Powertrain families
- ALPINA B4 twin-turbo inline-six, ALPINA D4 twin-turbo diesel inline-six
- 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.
- 01AlpinaWikipedia contributors
Secondary company, manufacturer-status and model-line context.
- 02BMW 4 Series F32/F33: ALPINA model historyALPINA Automobiles model archive
Factory model archive with base BMW, production dates, engine type and performance by derivative.
- 03Expanding the portfolio: BMW Group acquires the ALPINA brandBMW Group PressClub
Primary record of the independent ALPINA programme ending after 2025 and the trademark transition to BMW Group.
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.
- Coupé and Cabriolet need separate mass, roof and luggage records.
- B4/D4 shares components with B3/D3 but remains a separate commercial and body line.
- 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: Tokumeigakarinoaoshima, CC0 · 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