Parts & Upgrades

Range Rover Classic Engine Upgrades

From short 200/​300TDi engines to fully balanced large displacement turn-key uprated Rover V8 engines which have been fully set-up and been correctly bench run-in with Dyno reports.

High Torque/​High Efficiency Fuel Injected V8 Engines

2024 built engines have a 12-month unlimited mileage warranty which is automatically EXTENDED TO 3 YEARS if your car is serviced every 6000 miles or 12 months (whichever is soonest) by Kingsley.

These simply beautiful engines are machined to our specification by our engineering partner and then we modify the internals of the plenum chamber, fit the latest generation of fuel injectors, replace the standard mass air flow meter and upgrade the 14CUX fuel injection system to suit these changes.

The differences these changes make are startling, not only is the performance increased, to between 260bhp and 320bhp (depending upon the displacement) but the torque is increased massively up to 320 ft-lb which really aids cross country progress and yet the car will return up to 25mpg which is an impressive increase over standard.

Cylinder blocks and short engines produced are very carefully prepared. All units, as a minimum, have all these operations completed before the build is finished:

  • Block - all oil flow-ways optimised (certain sharp edges are curved, to improve flow), oil galleries physically cleaned and re-plugged.
  • All cylinders are re-lined with new flanged liners, to 88.9, 94 or 96 mm as required.
  • Crank - re-ground if necessary, all oil drillings cleaned and sharp edges removed, journals polished. All reground cranks are ‘Tuftrided’ (hardened) after grinding. All cranks are carefully perfectly balanced.
  • Rods - 4.6 and 5.0 rods are selected, crack tested and balanced.
  • Pistons - full-quality items, carefully selected, prepared and balanced. Crank, rods, and pistons are also balanced together as the complete rotating assembly.
  • The short engine is test assembled to check for any further machining requirements (e.g. deck machining of the block). When finally ready, all is fully assembled and checked.

All engines are supplied with new cam and lifters. Cam choice obviously depends on the planned use of the engine, the valves sizes, and the level of gas-flow work in the cylinder head ports.

All cylinder heads are thoroughly cleaned, and the oil and water passages carefully checked. The faces are machined (skimmed) if necessary and the eight combustion chambers in a pair of heads are measured, modified, and balanced to be sure they have the same volume to give equal compression ratio across the engine. For your engine, we will make a 9.35:1 CR. New valve seats are fitted where necessary and all seats cut to the same height and blended into the combustion chamber surface shape. In your engine, we will be fitting the larger valves and ‘unleaded/ethanol’ valve seats as used in the SD1 Rover and later Range Rovers, using 40 mm inlet valves and 34 mm exhaust valves.

The internal passages of the inlet manifold will be smoothed where necessary to improve gas-flow, and the junction with the cylinder heads will be matched and the gasket prepared to avoid disturbing the airflow. External surfaces of major components are ‘Aquablasted’ for an ‘as new’ finish.

We can also supply, rebuilding and re-timing an electronic distributor, as used on late Range Rover and Discovery Series 1 (the mid-1990s). We fit alternative springs and grind the bob-weights to produce the optimum ignition curve for the engine


High Torque/​High Power V8 Carburettor Engines

These engines are machined to our specification with a displacement of 4600cc by our engineering partner and carefully assembled by our highly skilled engine builders to provide an engine that is super smooth and reliable but has useful gains in power and enormous gains in torque.

The engine, like all of our high-torque units, is fully bench run-in and fully set-up with modified SU carbs/​airbox and with large exhaust ports that are suitable for . The unit is also supplied with its Dyno report. This is literally a plug and play’ solution which will produce circa 220bhp and 300 ft-lbs torques @ 3000rpm.

Shown with optional Kingsley Tubular exhaust manifolds / system. 


Rover 3.5, 3.9 & 4.2 Litre Standard Engines

Kingsley rebuild standard specification Rover V8 engines. Details for these engines can be found in the Engine rebuild section of the Restoration section. 


GM LS3 Engines

Our GM LS3 driveline conversion is not just an engine swap’ but a fully re-engineered conversion.

We start with a GM LS3 which out of the crate’ produces 430bhp and an insane 430 ft lb of torque. The torque would literally break most driveline components, which necessitates upgrading the front and rear differentials, prop shafts, UJ’s, half shafts, hub assemblies and the transfer box is built with strengthened internals (which has a custom adapter made to mate it to the GM 6 speed automatic gearbox).

As well as the driveline changes the chassis has to be modified to accept the custom made engine and gearbox mounts, the sump of the LS3 has to be modified to clear the front axle, the central chassis crossmember has to be replaced with a custom version, the radiator is custom made as is the mounting of the GM air conditioning compressor and custom manifolds and exhaust system – this is a conversion which is best undertaken with the body off the vehicle and so is better suited as an element of a body restoration.

6.2 litre with GM 6 Speed Automatic from £32,500+VAT

200TDi & 300TDi Turn-Key Engines

We supply fully rebuilt 200TDi and 300Tdi turn-key and short engines with or without the ancillaries, timed diesel pump etc. with worldwide shipping which we can also install at our workshop.

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