Vehicle Tuning and Performance

Vehicle Tuning & Engine Remapping


Vehicle Tuning and Performance

Tuning & Remapping

We have vast experience enhancing the performance and economy of all vehicle makes and models over the years – we know what works and what doesn’t! We are independent from the other tuning companies so can recommend the correct modifications to suit your vehicle. Only the hands-on expertise of our long standing experienced technicians gives us the confidence to state that we can make your vehicle run and perform better. All our tuning solutions are there to aid further low down power and performance to aid more efficient overtaking, towing, carrying heavy loads, heavier overland or commercially built vehicles. Our tuning is solely there to gain previously mentioned performance advantages but not provided to aid vehicle owners to abuse their vehicles for long periods of time above the national speed limits.


Tuning is a very widely used term that may consist of all manner of engine performance enhancements which means it is paramount that vehicle owners research potential solutions and make sure we have a good understanding of how the vehicle is to be driven, type of usage and expectations so we can give the correct advice and solution. Most of our tuning service is for Land Rover Defender’s from 1999 to current as these models run via engine ECU – electric control unit which gives us far more ability to tune via installing different ECU files to suit type of vehicle, work in conjunction with further upgrades and accessories and give performance advantages to aid more efficient overtaking, hill climbing, fuel economy and generally relaxing driving experience. Our tuning is not provided to encourage driving over national speed limits and or at maxim engine rpm for long periods of time.


Let us understand best options for your vehicle.

We are always delighted to help and advise whilst understanding your vehicle, primarily to give best advice that may suit. Firstly we need to understand age, specification and condition and the sort of requirements you may have to enable our team to advise if there is a cost-effective advantage we can offer that will give noticeable uplift in performance and driving experience whilst maintaining long term reliability.

There maybe the rare occasion where we can understand your vehicle and report concerns about condition and or engineering issues which would mean it may not be a good recommendation to carry out further tuning and performance upgrades.

We always offer a vehicle check to understand vehicle condition, to report and thoroughly check and test your vehicle prior to installing any engine upgrades and or tuning and performance. Sincere help and advice based on huge experience in this field since 1988 remains our priority.


Where to start, best value for money.

Our tuning solutions are all stand-alone or can be tailor-made as a combination of different solutions to radically transform your vehicle in a way that often our clients will wonder if they are driving the very same vehicle left with us. Regularly clients are over the moon with recommended and actioned transformations made. Most of our work is based around the Land Rover Defender TD5, 2.4 and 2.2TDci models but we have also got extensive experience and ability to add performance to most other LR products from TD5 Discovery, all TDv6 and 8 Discovery 3/4 and Ranger Rover including Sport models, Freelander II and later Discovery, Discovery Sport and Range Rover models. We also have extensive experience with some Toyota and Ford Ranger pickups enhancing engine and driving performance.


Popular upgrades for Puma Defender

Stage 1 or 2 tune

Full sound proofing program

Further or full carpeting of cabin

Upgrade or installation of hi-quality sound/comms/sat nav set up


Nene Overland provide a long standing service to further enhance the engine and driving performance of your vehicle whilst maintaining the same standard of reliability as the manufacturer in accordance with sensible responsible driving adhering to U K highway speed limits. Nene Overland will not be held responsible for obvious driver abuse on or off road if this becomes an issue as the result of driving continually beyond speed limiter speeds for long periods of time.

Land Rover Engine Conversions

If we cannot satisfy your needs with a few well-placed tweeks how about changing the game altogether and opting for a completely different engine?

The Land Rover Defender is blessed with being a sizeable unit with a great engine bay into which we can drop a whole host of engine options. These have all been carefully chosen and researched and, in some cases, have undergone extended R&D periods lasting many years. We are now confidently able to offer you a range of options that will deliver between 300bhp and 600bhp.

For the Puma-era Defender the best starting point is the 5-cylinder 3.2 TDCI. It is from the same stable as the standard 2.2 TDCI that Land Rover fits at the factory but with an extra cylinder, more than twice the power and offering V8-beating performance while keeping the legendary low-down diesel torque.

If you would like to switch to petrol and demand the ultimate performance then we have a range of options available from the 5.0 litre V8 from a Ford Mustang right up to 6.2 litres that will turn your Defender into a real ‘wolf in sheep’s clothing’ with similar performance to a Range Rover Sport.

Obviously it is not as simple as transplanting one lump for another we need to look at the gearbox, exhaust, suspension and brakes to complete the package. But we have all that covered too!

Gearbox conversions

Changing the gearing on a vehicle is often an overlooked modification when it comes to improving the performance and driveability of a Land Rover Defender. Years ago you were limited to fitting an overdrive – which we can still do, even to the latest Defenders! – but now there is much more choice.

Some people may just need to overcome the hard work that that a heavy clutch pedal requires. We can fit systems with better servo-assistance to make the clutch much easier to operate or we could fit an automatic gearbox.

Not all autos are the same, there’s no point trying to mate a 30-year-old gearbox design to a modern engine. We only use gearboxes that are up to the job. And we don’t just replace the ‘box, how it looks inside the vehicle is just as important. The gear-shifter needs to be easy to operate, conveniently located and aesthetically fits with the rest of the interior and trim. We look after all of this and the end result gives as factory-fresh a look as possible.

Sports Exhausts

An engine creates exhaust gasses, lots of it. We all know this. But did you know that the way those gasses are ejected and the path they take are just as important as the way the air gets in?

Fitting a big-bore, straight exhaust is not always the answer. Some engines need a certain amount of back-pressure in the exhaust system to give optimum performance. Our many years of carrying out engine conversions and performance tuning has equipped us with the best knowledge available. We know what will work with your particular vehicle and level of performance modifications so can advise you on the best options.


If you’re going to be propelling a two-ton vehicle along the road you’re going to want to be confident that it can stop too. Bigger discs, heavier duty calipers and better quality pads all help, as do the brake lines themselves. Like everything else we do it is the mix of components that give the best result. We can install a system that not only works on the track but also won’t be bothered by you driving off-road or through the mucky stuff, not all ‘performance’ brake packages will react kindly to being driven through a river! Ask us for advice.


Improving a vehicle’s performance isn’t just a matter of getting more power from the engine, how it handles on the road and how it reacts in a tight bend when you try to use that power is just as important. We have spent many years researching and building the ultimate handling systems for Land Rover Defenders. You can be confident that you won’t go into a bend testing the legendary 45° tip-over angle, our suspension packages will keep you on the level and smooth out even the harshest of rough road surfaces. Ask us for advice.

Please note: Your vehicle may need to have the latest ECU updates installed before any remapping or tuning can be carried out. We are able to do this for most makes of vehicle for a small additional fee. Please also understand that installing performance upgrades and ECU remapping may invalidate manufacturer’s warranty and you will need to inform your insurer of any work we carry out. We work closely with insurance companies and are able to give you a full breakdown of the work that should be acceptable to your insurance company. We can also recommend a good alternative insurance provider should you have any difficulty obtaining suitable cover for your modified vehicle.

Tuning and Performance Enquiry Form
Name (required)

Email (required)


Vehicle Make

Vehicle Model


Gearbox  Manual Automatic
Year of Manufacture

Which modifications are you interested in?
 Tuning and remapping Engine Conversion Gearbox Conversion Sports Exhausts Brakes Suspension

How did you first hear about Nene Overland? :
 Internet Search Existing Customer Referral Magazine or Newspaper advert Show or Event

Your Message

Back to top