<%@ page language="java" pageEncoding="utf-8" contentType="text/html;charset=utf-8" %> <%@ include file="/includes/tagLibs.jsp" %> <%@ include file="/includes/globalVariables.jsp" %> Green car technologies - Your car - Which? Advice <%@ include file="/includes/webSideStory.jsp" %>
BMW's Hydrogen 7 is a 'greener' version of the existing 7 Series

Green car technologies

  • Explained: how hybrid, electric and hydrogen cars work, and what they offer drivers
  • Find out which green fuel technologies will last - and which ones won't
  • We reveal the fuel-saving features top carmakers will be using on future green models

What's in this guide

Green cars explained

Going green is good for the environment and could land you with a refined, reliable motor.

Hybrid cars

The electric motors in hybrid cars can support or substitute for combustion engines.

Diesel hybrid cars

Peugeot aims to sell the first diesel hybrid in 2010 - with a claimed economy of 83mpg.

Hydrogen hybrid cars

Hydrogen cars are already in production, but they're not yet a practical choice.

Hydrogen fuel cell cars

Could zero-emission cars of the future be powered by liquid hydrogen?

Stop-start systems

Turning the engine off when a car stops is an obvious way to save fuel.

Brake energy regeneration

New technology makes it possible to harness the energy that's lost through braking.

Gearbox and aero tweaks

Tweaking conventional cars to make them greener is cheaper than using futuristic technology.