Greener & Cleaner

At a Glance

  • 10.2m to 11.4m hybrid low floor double deck bus
  • 61 to 78 seats
  • Alexander Dennis Hybrid technology
  • Reductions in fuel consumption and greenhouse gases circa 30%
  • Proven in operation throughout the UK
  • Wide rangof options

Enviro400H is an innovative double deck hybrid bus offering fuel and greenhouse gas reductions circa 30%. It’s derived from ADL’s Enviro400 – Britain’s definitive double deck.


The Enviro400H is the UK’s best selling hybrid-electric bus and introduces a new era of quieter, greener and more fuel efficient public transport solutions.

Its breakthrough technology derives from a pioneering partnership between ADL and BAE Systems and is the result of a meticulous development programme involving hundreds of millions of miles of in-service trials and operation.

Enviro400H’s unique combination of innovation and style includes a bright and welcoming interior with excellent access and seating capacity. It’s available in single and dual door specifications with a wide range of interior options, including luxury commuter trim and is fully compliant with ECWVTA legislation

This hybrid double deck has been hugely successful in demanding London operations, this success being mirrored in towns and cities across the UK including Manchester, Oxford, Reading and Edinburgh.


An open top tourist bus is the latest addition to the Enviro400H model range. Produced and marketed in partnership with bodybuilder UNVI, this bus provides exceptionally low emissions and fuel consumption combined with all the style and utility of a pace-setting tourist vehicle, raising the stakesĀ  for tourist operations throughout the world.