Highlights
- V6 Busso engine rebuilt to race tune by Brunswick Motorsport in 2024
- Resprayed to good standard in 2024
- Prepared for racing in the ARCA championship series
- Upgraded for the Classic Touring Car Racing championship
- Road-legal race car with MOT to August 2025 with no advisories
- Three sets of wheels and tyres and many spares included
The Appeal
The 75 is, for many, the last ‘proper’ Alfa Romeo. Rear wheel drive and a transaxle layout to deliver near-perfect weight balance, it is no wonder that the firm’s race team, Alfa Corse, chose it to spearhead a return to track-based glory.
It didn’t quite work out, but that was more due to Alfa-esque mismanagement than the car’s inherent abilities. It was quick and performed well. No surprise then, that many enthusiasts have turned stock 75s into track weapons.
Here is one, a carefully evolved 1990 75 built to compete in the ARCA and CTCR championships. Featuring a Busso 3L V6 fully rebuilt and tuned by Brunswick Motorsport in 2024 - they also rebuilt the transaxle - and Chris Snowdon racing suspension, this is a seriously sporting and competitive 75. The interior has been stripped and lightened interior with roll cage to Motorsport UK specification.
The car’s party trick is that it remains road legal - it even has an advisory-free MOT to August 2025 - so could be competed or simpy enjoyed on the road. With its recently resprayed bodywork it looks the part however you choose to use it.
History and Paperwork
- First registered 5th September 1990
- Originally built as a Twin Spark 2L factory car
- Correctly registered with DVLA as a 3L car
- 10 registered keepers
- Current keeper since July 2013
- Acquired by current keeper already prepared for ARCA championship series
- Converted from as-manufactured state in the early 1990s, maintained road legal
- Dry garaged throughout current keeper;s tenure
- Progressively upgraded since 2013 for the Classic Touring Car Racing championship
- Chris Snowdon Racing race specificaiton suspension
- Engine, transmission, and braking upgrades by Brunswick Motorsport in 2024
- Safety systems installed and updated to comply with Motorsport UK regulations
- No service book exists, but all principal invoices are retained
- MOT valid until August 2025 with no advisories
- Supplied with a large quantity of spare wheels
- Three sets of wheels and tyres included for all racing conditions
The Condition
- Resprayed in 2024 with paintwork in very good order sporting racing decals and yellow bonnet stripe
- Structural shell is sound and straight due to being dry garaged since 2013 and raced cautiously
- Some superficial light rust on the underside, but no structural corrosion according to seller
- Seller advises small patch of corrosion on the rear quarter under arch trim
- We are told that the car has never been crashed during racing so is structurally sound
- Bodyshell reinforced with a welded-in roll cage, including main and A-pillar hoops, diagonal bracing, and door bars
- Original side and rear glass windows replaced with 4mm polycarbonate lightweight race windows
- All interior trim and redundant electrical equipment removed
- Presents as a bare, painted shell with the dashboard and original instrumentation retained
- Supplementary gauges and switches fitted for race use
- Driver's seat is MSUK/FIA specification, rigidly fixed with a six-point race harness
- Includes a race seat and four-point harness for instructor/passenger use
- Lightweight, leak-proof race battery fitted in the left rear footwell
- Fire extinguisher bottle fixed in the front left footwell
- High capacity starter battery fitted in the original underbonnet position, quickly removable for racing
- Supplementary instruments and switches, along with internal controls for fire extinguisher and master circuit breaker, are on a drop panel replacing redundant heater controls
- Original Alfa Rosso red refreshed with a full respray in spring 2024, with a yellow flash added across the nose
- Offered with three sets of wheels and tyres for various conditions and uses
- Very stable under race conditions, but hard ride and interior noise levels less ideal on the road according to seller
- No structural advisories on last MOT
The Mechanics
- Fitted with 2,959cc 12V ‘Busso’ V6 rebuilt, balanced and tuned by Brunswick Motorsport in 2024
- 5spd manual gearbox with lower rations for short circuit racing
- Engine modified to race tune, producing 220bhp
- Engine specification summarised below
- Standard ECU replaced with an "Emerald" programmable unit, disc provided
- Aftermarket oil cooler fitted
- Silicon coolant hoses
- Exhaust fitted with silencers for road use with recent noise test recorded 88dB static
- Engine has competed in two race meetings since rebuild, performing faultlessly
- Transaxle stripped, inspected, and rebuilt by Brunswick during engine rebuild
- Larger front brakes with 4-piston calipers and 300mm diameter rotors replace original
- CL pads fitted for racing
- Fuel system upgraded as summarised below
- Near 50/50 front to rear weight balance achieved by rear-positioned transaxle unit
- De-Dion rear axle
- Rear brakes positioned inboard to reduce unsprung weight
- Independent front suspension with torsion bars and hydraulic dampers
- No reported running or driving issues
- No mechanical or running gear advisories on last MOT
Engine specification following 2024 rebuild:
- Gas-flowed and ported cylinder heads
- Colombo and Bariani mild race cams
- 11:1 compression ratio
- Enlarged inlet runners
- Stainless steel tubular exhaust manifolds
- Free-flow air filter
- Standard throttle body injectors and plenum box to comply with championship regulations
Fuel system:
- 30-litre foam-filled alloy race tank
- 1.5-litre surge tank
- Low and high-pressure fuel pumps
- Metal fuel lines with stainless steel braided flexible sections
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