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When performance

counts, count on us.

It's what we do

Engine machining and PERFORMANCE UPGRADES

With a full range of engineering services geared to performance, fast road, and classic cars such as Mini, and both air- and water-cooled Porsches, our specialists are ready to optimise any engine’s capability to give you the edge. With services spanning everything from gearbox builds to head reconditioning, we have the skills and expertise you need even if that means a custom build for a performance motorbike.


Experts in Machining Performance upgrades all engine types meeting your needs

Performance – it’s not necessarily just about going fast, beating your opponent, or indeed, yourself. It’s also about longevity, durability and predictable performance on the road or track. For us, performance stems from specialist engineering. At Fiennes Performance we have honed our skills for over two decades to cover everything from complete engine machining to flywheel balancing to create the optimum performance improvements.

A focus on optimising engine capability

Specialised engineering knowledge

Performance isn't always about a chequered flag


Making the most of your engine

A good engineer has keen powers of observation, an analytical mind and a capacity for perseverance. Yet, at Fiennes Performance there’s one more vital ingredient – deep knowledge. With specialist expertise across Mini, Porsche, Mitsubishi, Subaru, motorbike and indeed any other engine, the dedication to quality and attention to detail is absolute. So whether you need a precisely honed cylinder block, or the delicate modification of a Porsche crank case with an oil bypass, Fiennes can deliver.

Performance Mini
Classic Mini engine upgrades

Latest news

British Race Tracks – Thruxton Circuit

Thruxton Circuit, near Andover, Hampshire, is a 2.3 mile circuit that plays host to British Touring Car and Formula 3 racing events. Its particular distinction is that it is known as the ‘Fastest Circuit in the UK’, a boast that was proved largely accurate in 1993 when Damon Hill averaged 147 mph around it in […]

Porsche – The Heritage of a
Performance Engine Icon

There is something about the Porsche name that conjures up images in people’s minds. The iconic silhouette of the 911, that has changed so little through the many years and many incarnations of its production history, is one. But for those of a more mechanical mindset, it could just as easily be that famous flat […]

The Performance Mini: a brief history

At Fiennes Performance we know Minis. We are steeped in experience with all kinds of Mini engines, we know every trick in the book, and a few more, for extracting the maximum performance from them. But how did an engine designed to be a model of the simple and the reliable end up as a […]