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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteThe Alfa Romeo Busso V6 is the family of six-cylinder engines associated with engineer Giuseppe Busso. Its first production application was the 2.5-liter Alfa Romeo 6, launched in 1979; over the following decades, the design grew into multiple displacements and 24-valve versions used in cars including the GTV 6, 75, 156, 166 and GTA models.
What is the Alfa Romeo Busso V6?
“Busso V6” is the common name for Alfa Romeo’s V6 engine family developed under engineer Giuseppe Busso. The project began in the late 1960s as a 60-degree V6 intended for the brand’s medium- and high-class cars. Development slowed during the 1973 oil crisis, and the first production version arrived in 1979, according to the Museo Motori technical record.
The name refers to an evolving family, not one fixed specification. Displacement, cylinder heads, fuel systems and output changed across applications, so figures for one Busso cannot be applied to all of them.
Where did the Busso V6 first appear?
The first production car to use the engine was the Alfa Romeo 6, launched in 1979. Its 2.5-liter V6 used light-alloy components, two belt-driven overhead camshafts and six Dell’Orto carburetors. In this specific Alfa 6 application, Alfa Romeo reported 156 CV at 5,600 rpm and 224 Nm at 4,000 rpm. Stellantis Media says 12,070 Alfa 6 cars were produced from 1979 through 1985 (Stellantis Media, 23 May 2024).
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![Hot Wheels Alfa Romeo 155 V6 Ti, Spettacolare 1/5 [White]](https://m.media-amazon.com/images/I/51HhI-NzkpL._SL160_.jpg)
- Hot Wheels Alfa Romeo 155 V6 Ti, Spettacolare 1/5 [White]
Those output figures belong to the original carbureted 2.5-liter installation; they are not specifications for the later 24-valve engines.
How did the engine family evolve?
Over time, the Busso V6 appeared in versions from roughly 2.0 to 3.0 liters, including a supercharged 2.0-liter variant. Its applications included the GTV 6 and Alfa Romeo 75, 164, 155, 156 and 166, as well as some Fiat and Lancia sedans and modified competition cars. The list is representative rather than exhaustive, and fitment varied by model and version.
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- Compatible with VALEO, BOSCH, DELCO REMY, FIAT, LUCAS, LETRIKA, MAHLE, MAGNETI MARELLI, ALFA ROMEO, LANCIA. Please verify your OEM part number from your original unit to help ensure fitment.
- Replaces: Alfa Romeo / Fiat / Lancia Part Numbers: / 60813403, 60813460, 60814706 / 60512847, 605128470 / 60655876, 60585343 / 46414831, 77274850, 7727485 / 55193410, 55195503 / 1951005030, 195100503000 / Bosch Part Numbers: / 0 001 108 048, 0001108048 / 0 001 108 126, 0001108126 / 0 001 108 136, 0001108136 / 0 001 108 159, 0001108159 / 0 001 108 225, 0001108225 / F 042 002 037 / Sr0485x (Reman) / Marelli / Letrika / Lucas / Valeo / Delco Remy / Wilson: / Magneti
- Applications: ⚠️ 12 Volt 1.4 Kw 9 Tooth Bosch Pmgr Starter: / 12V, 1.4 Kw (1.88 Hp), Clockwise, Permanent Magnet Gear Reduction, 9 Tooth Pinion, About 8.2 Lbs / Replaces Alfa Romeo 60813403 / 60512847 And Bosch 0 001 108 136 / 0 001 108 048 / Sr0485x / Alfa Romeo 164: / 1991-1995 Alfa Romeo 164, V6 3.0L 2959Cc (Usa) / 1987-1998 Alfa Romeo 164 2.0 Twin Spark, 2.0 V6 Turbo, 3.0 V6 12V / 24V / Alfa Romeo 155 / 156 / 166 / 147 / Gt: / 1992-1997 Alfa Romeo 155 2.0 Twin Spark, 2.5 V6 /
- Applications: 2.0 Twin Spark, 2.5 V6 / 1997-2005 Alfa Romeo 156 And Sportwagon 2.5 V6 24V / 2002-2005 Alfa Romeo 156 Gta 3.2 V6 / 1998-2007 Alfa Romeo 166 2.0 V6 Turbo, 2.5, 3.0 And 3.2 V6 / 2003-2005 Alfa Romeo 147 Gta 3.2 V6 / 2004-2008 Alfa Romeo Gt 3.2 V6 / / Alfa Romeo Gtv / Spider (916): / 1995-2000 Gtv And Spider 2.0 V6 Turbo / 1996-2005 Gtv And Spider 3.0 V6 / 2003-2006 Gtv And Spider 3.2 V6 / / Lancia / Fiat: / 1994-2000 Lancia Kappa 3.0 V6...
- Starter Motor Source: Aftermarket
In 1992, Alfa Romeo renewed the engine with four valves per cylinder, first on the 3.0-liter version. A later example documented in detail is the AR32401 2.5-liter 24-valve V6:
| Specification | AR32401 2.5 V6 24V |
|---|---|
| Displacement | 2,492 cm³ |
| Output | 190 HP at 6,300 rpm |
| Torque | 222 Nm at 5,000 rpm |
| Compression ratio | 10.3:1 |
| Bore × stroke | 88 × 68.3 mm |
| Head and valve layout | Aluminum-alloy heads; four valves per cylinder |
| Camshaft drive | Two overhead camshafts per bank, driven by one toothed belt |
| Fuel system | Bosch Motronic ME 2.1 multipoint electronic injection |
| Applications and years listed | Alfa Romeo 156 and 166; 1997–2005 |
The figures and construction details are from the Museo Motori, University of Palermo; its record does not state a publication year.
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Rank #3
- Compatible with VALEO, BOSCH, DELCO REMY, FIAT, LUCAS, LETRIKA, MAHLE, MAGNETI MARELLI, ALFA ROMEO, LANCIA. Please verify your OEM part number from your original unit to help ensure fitment.
- Replaces: Alfa Romeo / Fiat / Lancia Part Numbers: / 60813403, 60813460, 60814706 / 60512847, 605128470 / 60655876, 60585343 / 46414831, 77274850, 7727485 / 55193410, 55195503 / 1951005030, 195100503000 / Bosch Part Numbers: / 0 001 108 048, 0001108048 / 0 001 108 126, 0001108126 / 0 001 108 136, 0001108136 / 0 001 108 159, 0001108159 / 0 001 108 225, 0001108225 / F 042 002 037 / Sr0485x (Reman) / Marelli / Letrika / Lucas / Valeo / Delco Remy / Wilson: / Magneti
- Applications: ⚠️ 12 Volt 1.4 Kw 9 Tooth Bosch Pmgr Starter: / 12V, 1.4 Kw (1.88 Hp), Clockwise, Permanent Magnet Gear Reduction, 9 Tooth Pinion, About 8.2 Lbs / Replaces Alfa Romeo 60813403 / 60512847 And Bosch 0 001 108 136 / 0 001 108 048 / Sr0485x / Alfa Romeo 164: / 1991-1995 Alfa Romeo 164, V6 3.0L 2959Cc (Usa) / 1987-1998 Alfa Romeo 164 2.0 Twin Spark, 2.0 V6 Turbo, 3.0 V6 12V / 24V / Alfa Romeo 155 / 156 / 166 / 147 / Gt: / 1992-1997 Alfa Romeo 155 2.0 Twin Spark, 2.5 V6 /
- Applications: 2.0 Twin Spark, 2.5 V6 / 1997-2005 Alfa Romeo 156 And Sportwagon 2.5 V6 24V / 2002-2005 Alfa Romeo 156 Gta 3.2 V6 / 1998-2007 Alfa Romeo 166 2.0 V6 Turbo, 2.5, 3.0 And 3.2 V6 / 2003-2005 Alfa Romeo 147 Gta 3.2 V6 / 2004-2008 Alfa Romeo Gt 3.2 V6 / / Alfa Romeo Gtv / Spider (916): / 1995-2000 Gtv And Spider 2.0 V6 Turbo / 1996-2005 Gtv And Spider 3.0 V6 / 2003-2006 Gtv And Spider 3.2 V6 / / Lancia / Fiat: / 1994-2000 Lancia Kappa 3.0 V6...
- Starter Motor Source: Aftermarket
Which Alfa Romeos had a Busso V6?
Representative Alfa Romeo applications documented in the technical record include:
- Alfa Romeo 6: the original 2.5-liter, carbureted production application from 1979.
- GTV 6 and Alfa Romeo 75: examples of the earlier V6 family.
- Alfa Romeo 164, 155, 156 and 166: later models offered with Busso-family engines in particular versions.
- Alfa Romeo 147 GTA and 156 GTA: received the 3.2-liter, 250 HP V6 introduced in 2002.
These names identify models with documented applications, not a claim that every trim, market or model year used the V6. Confirm the exact engine code and vehicle specification when researching a particular car.
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What made the Busso V6 historically significant?
Its significance lies in the span of its development and use: a 1979 debut in the Alfa 6 led to a varied engine family that served Alfa Romeo models through the 24-valve era. The progression from the original 2.5-liter carbureted configuration to electronically injected, four-valve-per-cylinder engines shows how the design adapted rather than remaining one unchanged specification.
The 2.5-liter AR32401 also received an international Engine of the Year award in the 2–2.5-liter displacement class in 2000, as recorded by Museo Motori. This is an award for that displacement class and variant context, not a general ranking of every Busso engine.
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- Compatible with 2016-up Alfa Romeo Giulia (952), 2017-up Alfa Romeo Stelvio
- One piece of the car's interior racing sport-inspired premium carbon fiber engine ignition push start button decoration cover trim
- Handmade red gloss finish genuine woven carbon fiber material with "ENGINE START STOP" screen print lettering/symbol, coated with a UV protective layer, and self-adhesive double-sided tape on the back
- Installation Tips: 1) Clean the original push starter area with rubbing alcohol, ensuring it dries completely without any dust or oil/wax residues; 2) Peel the backing and apply the decorative cover or ring over the original button, ensuring proper letter orientation; 3) Apply adequate pressure for approximately 2 minutes to ensure full bonding (Please note that this direct fit carbon fiber will cover the OEM push starter's indicator light)
- Ignite your ride's engine with style using iJDMTOY's Engine Start Up Button, instantly enhancing your vehicle's interior aesthetics with a premium, sporty, and luxurious accent for a refined touch
Enthusiasts often associate the Busso with a distinctive character, but the cited technical and manufacturer records do not provide comparative sound, reliability or owner-satisfaction measurements. Those qualities should be treated as reputation, not as quantified evidence here.
What should owners check before servicing one?
Exact variant identification matters. The AR32401 record specifies toothed-belt-driven camshafts, but that fact alone does not establish parts fitment or service intervals for every Busso engine or vehicle.
Quick Recap
- Verify the car’s model year, market and engine code before ordering components.
- Match timing-belt parts and service information to that exact engine and application.
- Do not assume a component listed for one 2.5-liter Busso fits another displacement or generation.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
