Because they are more efficient and operate at higher pressures, the particles that they emit are smaller than those from conventional diesel units.

In the years ahead, conventional diesel and petrol cars will go increasingly far on every litre of fuel.

The exhaust gases, he says, smell less like conventional diesel and more like a chip shop.

Ministers are preparing to tackle overpriced electric car charging amid fears that it can cost as much to run a green vehicle as a conventional diesel.

Her nuclear reactor and propulsion plant were removed and replaced by a conventional diesel engine room.

Critics of the fuel point out that diesel emissions are tested in a laboratory and real-world tests have shown that they emit far more pollution.

Is this a way for car giants to help us to forget the 2015 diesel emissions scandal?

Platinum and palladium are crucial constituents of the exhaust catalysts that have to be fitted to curb petrol and diesel emissions.

Most scented candles are made with paraffin, which gives off soot particles that are seen in diesel emissions and are known carcinogens.

It has admitted fitting 11 million diesel vehicles worldwide with 'defeat device' software designed to cheat diesel emissions tests.

In short, it's the coolest people carrier on the road for the big family and it's eco-friendly, with a two-litre turbo diesel hybrid engine capable of 70mpg.

So why has no one thought to make a diesel hybrid before?

It will be the first volume production diesel hybrid when it goes on sale in the spring of 2011.

It's the world's first diesel hybrid.

These are generally standalone solar (or solar diesel hybrid) electricity systems.

Though finely textured, it was robust: still audible when a lone diesel locomotive rumbled by.

It was being propelled by a diesel locomotive disguised as a van behind it.

A small diesel locomotive hauled a single 53-seat passenger coach.

This experimental diesel locomotive was to be built in the fourth quarter of 1944.

The first diesel locomotive was tested on the line in the 1930s.

Not least when they could not only raise cash on the markets but use petrol and diesel motor sales to bankroll their electric business.

The diesel motor should be able to do around 42.8mpg but with ordinary hypermiling he says he has already improved his fuel economy by 40 per cent to 59mpg.

It was powered by a 2000 cc turbocharged diesel motor.

Besides electric power, it also uses a diesel motor.

In order to start the diesel motor, it has to be pre-heated.

Upon our purchase of it, though, the diesel pump packed up.

They appear to have been designed to help families who cannot afford to buy a diesel pump.

Garages cordoned off commercial diesel pumps but allowed ordinary motorists to get fuel.

The company admits openly that it claims that the leg pumps save carbon, even if the farmers previously did little or no diesel pumping.

More vehicles having to stop for longer at shorter intervals would mean a massive increase in the number of charging stations over petrol/ diesel pumps.

The emission problems recently led some councils to impose new charges on diesel vehicle drivers.

It takes roughly the same time to refuel as a petrol/diesel vehicle while battery cars need at least six to eight hours.

They can be refuelled with hydrogen in the time it takes to fill up a petrol or diesel vehicle.

I could have bought a normal diesel vehicle achieving this consumption and saved up to 10,000.

It lost €1.2 billion in the second quarter as the company booked €4.2 billion in onetime charges for troubles with diesel vehicles and airbag recalls.

Biodiesel, blended with petroleum diesel, has a low sulphur content, reduces unburnt hydrocarbons and produces less carbon monoxide and particulate matter.

Biodiesel also may reduce health risks associated with petroleum diesel.

Diesel for land and sea transport will be a blend of 5% processed palm oil and 95% petroleum diesel.

After this processing, unlike straight vegetable oil, biodiesel has combustion properties very similar to those of petroleum diesel, and can replace it in most current uses.

Delivering 109bhp, the modified 1.6-litre turbocharged diesel engine provides improved fuel economy by 5.1mpg to 62.8mpg, increasing the cars' range to nearly 1,100 miles.

In an attempt to lower the floor height of the vehicle, the turbocharged diesel engine was tilted over to one side around 1978.

The on-road acceleration of an automatic transmission can occasionally exceed that of an otherwise identical vehicle equipped with a manual transmission in turbocharged diesel applications.

It was powered by a 2000 cc turbocharged diesel motor.

The air-cooled, turbocharged diesel engine sits to the right rear of the driver.