BMW M5 E28 Engines -The Complete UK Guide
Every engine fitted to the first-generation M5 E28 -from the M88/3 straight-six to the US-market S38. Real UK replacement costs, honest classic ownership data, and the hand-built M-division engine that defined the ultimate sports saloon.
Explore E28 M5 Engines
BMW M5 E28 Engine Codes -The Complete Database
Every engine fitted to the first-generation M5 -from the European M88/3 to the North American S38B35.
Overview
BMW M5 E28 -Overview
The E28 M5 is the first-generation BMW M5, the original sports saloon that defined the genre.
Hand-built by BMW Motorsport GmbH from late 1984 to 1988, it was based on the E28 535i chassis but powered by a modified version of the M88/3 engine from the BMW M1 supercar -making it the fastest production saloon in the world at the time. The M5 was offered in left-hand drive for Europe, right-hand drive for the UK and South Africa, and left-hand drive for North America with a detuned S38 engine.
Key Facts
Platform
BMW E28 (second-generation 5 Series)
Predecessor
None -first BMW M5
Successor
BMW M5 E34
Sibling body styles in this generation
4-door saloon only
Market Intelligence
As a classic icon that ended production in 1988, the E28 M5 is now a highly collectable enthusiast vehicle -the M88/3-powered UK and European cars are the most sought-after, while the S38-powered US cars are rarer but less powerful.
Best & Worst Engines
Thin-Data Summary
“The E28 M5's engine range is defined by one legendary powerplant -the M88/3 -and its North American sibling. The M88/3 3.5-litre straight-six (Europe and UK, 1984–1988) is the engine that started it all -286 bhp, 340 Nm of torque, and a 7,000 rpm redline derived directly from the M1 supercar. It features individual throttle bodies, four valves per cylinder, and a 10.5:1 compression ratio -a genuine motorsport engine in a four-door saloon. The S38B35 (North America, 1987–1988) is essentially the same engine but with a lower 9.8:1 compression ratio and a catalytic converter, producing 256 bhp. Both engines are robust when maintained, but the M88/3 is the one that commands the highest prices and the most respect. If you're buying an E28 M5, the M88/3 is the definitive choice; the S38 is still a brilliant engine but with less power and a different character.”
Who it's for:
BMW M5 E28 -Ownership Economics
The E28 M5 rule
A £8,000–£14,000 M88/3 recon against a £40,000 E28 M5 sits at 20–35% of the car's value -within our 70% BMW threshold. Against a well-kept £60,000+ example, the same recon drops to 13–23% -a maintenance decision, not a financial one. On a concours example, the engine rebuild is simply part of ownership. On a sub-£25,000 project car, budget carefully.
Key Takeaways
Which E28 M5 Costs Least To Own?
M88/3 -maintenance is expensive, but the engine is robust when properly maintained.
Which E28 M5 Costs Most To Own?
M88/3 -parts are increasingly rare and specialist-only.
Which E28 M5 Is Best Value?
M88/3 -the definitive first-generation M5 engine, worth the premium.
Common Problems
E28 M5 Engine Replacement Costs -By Engine and Condition
Core Variants
Diesel & Petrol Lineup
Petrol Variants
Scope note: All variants listed are E28-generation M5 only (1984–1988). The M5 was only available as a 4-door saloon in this generation. UK cars were right-hand drive and used the M88/3 engine.
Market Intelligence
Most Requested E90 Engines (2025)
Most Requested E90 Variants
Average E90 Replacement Cost
Most Common E90 Failures
FAQ
Why UK BMW M5 E28 Owners Trust bmwengines.uk
Trusted E28 M5 Engine Suppliers
every garage and engine rebuilder in our network is vetted, rated and reviewed by real E28 M5 owners, as part of the Engine Finders network.
Compare E28 M5 Engine Replacement Companies
see prices, warranty terms and supply & fit options side-by-side before you commit.
UK Engine Replacement Services for E28 M5
covering both M88/3 and S38B35 variants, with supply-only or full supply & fit available nationwide.
Find the best BMW M5 E28 engine replacement UK drivers rely on. Compare real prices from trusted specialists on EnginesMarket today and get back on the road with confidence.
