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Our aim is to work with you on your asset-management, INCREASING your vehicle’s value

Welcome to AddSpeed - your Porsche, Performance Car and Classic Car specialists situated in the heart of Mid Sussex.

Check out for yourselves some of our extensive reviews and you'll soon see why our customers tell us that we're the South of England's favourite Porsche, Performance Car and Classic Car specialist.  They feel it's  because we go all out to offer them a complete package – everything from routine Porsche and Performance Car servicing and maintenance through to beautiful vehicle restorations and quality engine rebuilds – and all at affordable prices.

Further, our customers know that we ensure your Porsche and Performance Car Warranty remains intact by using genuine vehicle parts.

At Addspeed, we especially look after all Porsche models from the classic 356 and 911, to the Boxster, Cayman and Cayenne.

Our experienced technicians offer a full range of services to ensure your vehicle performs as good as the day it was made - hopefully even better!  We'll work on all high performance vehicles – both old and new, including Porsche, Ferrari, Maserati, Jaguar, Aston Martin, BMW, Audi, Lotus, Mercedes and TVR – just to name a few!

(Little secret) Come and visit us and you'll also see that we're quite happy to likewise maintain your daily run-around too. You'll see that our dedicated workshop includes the latest in vehicle and performance car diagnostic equipment.

AddSpeed - Porsche, Performance Car and Classic Car specialists, Sussex - for all your servicing, maintenance, MOT and restoration needs in Horsham, West Sussex.  We're very close to train and motorway links and we offer a collection and delivery service of your vehicle.

Latest News


Porsche 997 Carrera, or 997 GT3?
A 2006 Model

At a quick glance it's convincing, not so much for the aero kit – which some specified from new and has never signified a GT3 on its own – but mainly because of their stance and the GT3-style centre exit exhaust. Read more ...

Mercedes 190SL Convertible
A 1962 Model

A beautiful example of an extremely rare classic car that we are maintaining for our customer who has owned it since 1970. Not only has it been a joy to drive but has also significantly appreciated in value over the years.  Read more ...

Porsche 911E
A 1972 Model

Designed to be the more comfortable, more drivable model of 911 – fitting between the tamer 911T (Touring) and the high-performance type 911S (Super), the 911E came standard with the "comfort" package of features.  Read more ...

Ferrari 355 Berlinetta GTB
A 1995 Model

A beautiful mid-engined, V8-powered two-seat coupe. The F355 saw the introduction of a 5-valve cylinder head which allowed for better intake permeability and  that produced 380 PS (279 kW; 375 hp)   Read more ...


Absolutely amazing customer service and aftercare, Keith runs an honest and more than capable team, cannot recommend this business enough.

Andrew Pattenden

My family has used Addspeed for over 15 years on a variety of daily runners to more recently sports and classic cars. With outstanding customer service and a very down to Earth and friendly team, I would certainly have no hesitation in recommending them.

Adam Lillywhite

I have used Addspeed for many years and have found the standard of work on my old 911 to be high, the charges fair and the service friendly and helpful. I have no hesitation in recommending them.

Connie Tremlett

Addspeed, quite simply one of the best companies l have ever had the pleasure of doing business with. They have gone out of their way to help me over the years and have never let me down.

Colin Ralph

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