Volvo FM420

Powertrain and Transmission

The Volvo FM 420 is powered by a 12.8L inline-six diesel engine, delivering 420 hp and 2100 Nm of torque across all model years (2010–2024). The D13C (Euro 5) and D13A (BS-IV) variants provide peak torque from 1000–1400 rpm, while the latest D13K engine (Euro 6/BS-VI) improves low-end response with maximum torque available from 860 rpm. Common rail injection (up to 2400 bar) and an 18.0:1 compression ratio on the D13K enhance efficiency and driveability. The Volvo Engine Brake (VEB+) is optional on recent models, providing up to 375 kW of braking power.

All FM 420 units utilize the I-Shift 12-speed AMT, with available variants like Dual Clutch for uninterrupted torque shifts and Crawler Gears for high GCW startability (up to 325 tonnes) and ultra-low-speed control. The Change Direction function, introduced in the 2020s, enables rapid forward/reverse switching for site operations. A gas-powered FM 420, running on LNG or bio-LNG, matches diesel output and offers an operating range up to 1000 km.

Chassis, Configurations, and Suspension

The FM 420’s robust steel chassis supports multiple configurations: 4x2 and 6x4 tractors for freight, 8x4 tippers for construction, and vocational variants for specialist roles. Axle setups include tandem drive and hub-reduction rear axles for challenging terrain. Air suspension with multiple ride height settings is standard in highway variants, while heavy-duty bogie leaf suspension is available for off-road and tipper applications.

Cab Design and Driver Interface

The current-generation (post-2020) FM 420 features a new cab with up to 1000L increased internal space, reduced noise by 2dB, and 10% improved direct visibility using a larger windscreen and revised pillars. Cab options include Day, Sleeper, Globetrotter (up to 210 cm standing height), and Crew cab. The digital cockpit offers a 12" main display and optional 9" side display, supporting camera feeds and advanced load monitoring.

Safety and Advanced Features

FM 420 units offer progressive active safety assistance: VDS (Volvo Dynamic Steering), ESC, EBS, and a full ADAS suite with Collision Warning, Emergency Brake, Side Collision and Lane Keeping support. On-board connectivity via Volvo Connect enables remote diagnostics, over-the-air software updates, and advanced fleet management integration.