Dennis Trident 2

The Dennis Trident 2 is a 2-axle low-floor double-decker bus chassis originally manufactured by Dennis, which was unveiled in 1997 and replaced the Dennis Arrow. It was built by TransBus after Dennis was incorporated into the group in 2001. From 2004, it was built by Alexander Dennis. The Dennis Trident 2 can be built as either a closed top bus or an open-top bus.

Maghull Coaches East Lancs Lolyne bodied Trident 2 in 2013

Blackpool Transport East Lancs Myllennium Lolyne bodied Trident 2 in 2013

First Kernow Plaxton President bodied Trident 2 in 2018

Dennis Trident 2
Stagecoach London Alexander Dennis ALX400 bodied Trident 2 at Queen's Hospital on route 498 in 2015
Overview
Manufacturer	Dennis Alexander Dennis
Production	1997–2018
Body and chassis
Doors	1 or 2
Floor type	Low floor
Powertrain
Power output	Cummins C-series: 220hp, 245hp Cummins ISCe:: 225hp, 260hp Cummins ISBe: 250hp (diesel), 185hp (hybrid) Cummins ISLe: 320hp MAN D0836LOH: 250hp
Transmission	Voith DIWA ZF Ecomat ZF EcoLife (Enviro400 only)
Dimensions
Length	2-axle Trident: 9.9m, 10.5m, 10.6m, 11.4m Enviro400: 10.1m, 10.2m, 10.5m, 10.8m, 10.9m, 11.4m
Width	2.55m
Height	4.1m to 4.4m
Chronology
Predecessor	Dennis Arrow

The Trident 2 chassis features a transversely mounted engine on the right side, with the radiator mounted on the left side of the engine compartment. It could be fitted with C-series Euro II engine (later Cummins ISCe Euro III engine), coupled to Voith DIWA or ZF Ecomat gearbox. It was available with Alexander ALX400, Plaxton President and East Lancs Lolyne/Myllennium Lolyne bodywork.

In the first few years of production, the Trident 2 was popular with a large number sold to large bus operators such as Stagecoach, FirstGroup, Travel West Midlands and Lothian Buses. Some Tridents were exported to Ireland (for Dublin Bus[1]) and Spain (for sightseeing operations in Barcelona and Madrid). But later, due to increased competition after the launch of the Scania OmniDekka and TransBus being put into administration, the sales of Trident 2 dropped significantly, leaving Stagecoach as its major buyer.

In 2005, Alexander Dennis developed the new version of Trident 2 chassis for its Enviro400 double-decker. Marketed as the Enviro400 chassis, the name "Trident 2" continued to appear on the manufacturer's plate [2] and it retained the Cummins ISCe Euro III engine (soon replaced by Cummins ISBe 6-cylinder Euro IV) and Voith/ZF gearbox, it also received a number of modifications such as a longer front overhang, with a different shape of fuel tank became available. Production of the older version of Trident 2 chassis continued until 2006, with the newest example being delivered to Isle of Man Transport.

The new version of Trident 2 chassis was also available with Darwen/Optare Olympus bodywork, the first example was delivered to CT Plus of London in 2008.

In 2008, Alexander Dennis unveiled the hybrid-electric powered version of Trident 2 (the Enviro400H) using BAE Systems's HybriDrive series drive system with Cummins ISBe 4-cylinder engine fitted for power generation.[2] Also in the same year, Alexander Dennis unveiled the further developed version of Trident 2 for the "New Generation" Enviro400, with the engine being moved to the left side and the radiator being moved to the right side of the engine compartment.[2] It could be fitted with Cummins ISBe Euro V/EEV or MAN D0836LOH engine, coupled to Voith DIWA or ZF EcoLife gearbox. In 2009, Alexander Dennis developed the Hong Kong version of the Trident 2 (Enviro400). Based on the further developed version unveiled in 2008, it has a longer rear overhang and could be fitted with Cummins ISLe Euro V engine.