Representing the next generation of high-speed, water-cooled diesel engines, the Perkins Engines Company Phaser has been designed to replace the successful Perkins T4.236 and T6.354 engines and spans the range of 80 to 157 kW (106 to 210 bhp) in four-cylinder 4 litre and six-cylinder 6 litre forms.

The Phaserfamily has been designed to operate over extended service intervals, typically 20,000 km between oil and filter changes and 100,000 km between valve tappet checks. Phaser incorporates state-of-the-art construction including deep skirted, computer optimised cylinder block design supporting silicon carbide honed dry cylinder liners, controlled expansion oilspraycooled pistons and forged molybdenum steel connecting rods and crankshaft.

The unique 'Quadram' combustion system eliminates high peak pressures and gives a cleaner burn helping to keep combustion noise to a minimum, reducing mechanical stress and giving enhanced reliability and durability together with cleaner emissions.

The Phaser 110 T has been installed as a retrofit package in Malaysian Army Ferret scout cars (100 supplied, with Alvis Vehicles being prime contractor, see earlier in this section) and is in production versions of the Reynolds Boughton RB44 (4 x 4) logistic truck now in service with the British Army. Alvis Vehicles, previously known as GKN Defence, selected the six-cylinder 210 Ti engine to power 150 Simba (4x4) light combat vehicles now supplied to the Philippines.

Phaser retrofit packages have been developed and are approved for the Alvis Vehicles FV600 family of vehicles including the Saracen armoured personnel carrier, Saladin armoured car and the Stalwart High Mobility Load Carrier.

The 6 litre six-cylinder Phaser 180 Ti is the preferred choice for the Alvis Vehicles retrofit programme for the FV600 series.

Two Perkins Phaser engines, the 195 Ti and 180 Ti are retrofit options for CVR(T) series vehicles.

More recently introduced is the Phaser 250 MTi which is based on the highly successful Phaser range of commercial engines of which there are more than half a million of this series already in operation worldwide.

At the heart of this engine is the Fastram combustion system which features a re-entrant piston bowl with a central pipe which maximises air and fuel mixing for more complete combustion, thereby improving fuel consumption and reducing emissions.

This engine has been selected by Alvis Vehicles Limited as the power unit for the export version of the Stormer APC.

In production. Known customers include Indonesia, Malaysia, Philippines and UK.