DAF Trucks has introduced a revised range of drivelines for its LF series of trucks. The new PACCAR PX-5 and PX-7 engines in combination with the new automatic 8-speed PowerLine gearboxes result in up to 7% higher fuel efficiency compared to the already very efficient models.
There is no mention of the lower-powered 3.8 litre PX-4 engine that is used at power outputs of 156 and 172hp but DAF have introduced a lower powered option in the PX-5 suggesting that the engine range has been rationalised with the lowest output now 170hp. Across the range, the incoming model has a slightly lower power output than the current version. This is unusual for a truck manufacturer, as they usually take the opportunity to increase outputs by some 10 hp at the time of engine line up.
Engine Outgoing power New models Incoming Power
PX-4 156 hp N/A N/A
PX-4 172 hp PX-5 170 hp
PX-5 184 hp PX-5 190 hp
PX-5 213 hp PX-5 210 hp
PX-7 234 hp PX-7 230 hp
PX-7 264 hp PX-7 260 hp
PX-7 295 hp PX-7 290 hp
PX-7 325 hp PX-7 310 hp
New highly efficient engines
The 4.5 litre 4-cylinder PACCAR PX-5 engine and the 6.7 litre 6-cylinder PACCAR PX-7 engine have been completely redesigned. Both state-of-the-art engines are characterized by a new lightweight yet ultra-strong Compacted Graphite Iron (CGI) block and cast-iron cylinder head, new low-friction pistons, new highly efficient compressors and a new waste-gate turbo.
Full range of engine ratings
The new PACCAR PX engines for the DAF LF series are available in 7 output ratings The 4.5 litre PACCAR PX-5 engine comes with outputs from 124 kW (170 hp) to 153 kW (210 hp) and the 6.7 litre PACCAR PX-7 engine has outputs from 167 kW (230 hp) up to 227 kW (310 hp). The engines develop peak torque at even lower engine speeds, supporting down-speeding and thus excellent fuel efficiency.
PowerLine automatic gearboxes
Part of the new DAF LF driveline is the new 8-speed, fully automatic PowerLine transmission, which feature optimal gear spread and steps. Powershifting without any torque interruption enables smooth shifts and quick throttle response, resulting in excellent comfort and driveability. In addition, the new transmissions provide outstanding low speed maneuverability, enabled by an urge-to-move feature upon releasing the brake pedal.
6- and 9-speed manual transmissions will remain available for the DAF LF series, while fully automatic Allison gearboxes will continue to be available for special applications, such as refuse collection and firefighting.
The new PACCAR PX-5 and PX-7 engines and PowerLine transmissions – in combination with optimized rear axle ratios – result in fuel savings of up to 7%, depending on the application, further enhancing the excellent business proposition of the DAF LF series in the distribution segment.