Prices do vary, but here's a rough guide:

• A typical 4 cylinder non DI starts from £1,500 +VAT
• A 4 or 6 cylinder is approx. £2,000 +VAT
• An 8 cylinder starts from £2,250 +VAT

For a detailed FREE quote specific to your vehicle, contact us today.

Prices do vary, but as a rough guide CNG conversions start from £2,800 +VAT and this is mainly due to the extra cost of the tank.

For a detailed FREE quote specific to your vehicle, contact us today.

Again prices do vary, but as a rough guide to convert an HGV to run on CNG or LNG Diesel Blend dual fuel, prices start from £16,000 +VAT, subject to tanks and survey. Depending on the type of vehicle and your requirements, several design options are available for the gas tank configuration.

For more information and a detailed FREE quote specific to your vehicle, please contact bruce@alternatech.co.uk today.

A typical conversion usually takes between 3 to 5 days.

An average saving of between 25% - 40% can be achieved for LPG conversions compared to running on petrol.

Here's an example calculation for a car covering 24,000 miles per year on petrol:

• 28 MPG
• Petrol consumption: 857 gallons or 3,891 litres
• £1.85 per litre = £7,198.35 cost of petrol per year
  

For the same car covering 24,000 miles per year on LPG:

• 22 MPG (30% drop in economy)
• 5,448 litres @ £0.95 per litre = £5,175.60

Petrol cost £7,198.35

LPG cost    £5,175.60

Total yearly saving £2,022.75

Pay back on conversion is normally less than 1 year with an average saving of between 25% - 40%.

PLEASE NOTE: Fuel prices subject to change. Example costs correct as of September 2022.

Where the tank is installed varies from vehicle to vehicle. It could be a cylinder tank in the boot, a toroidal (donut shaped) tank in the wheel well, sill tanks or an underbody tank alongside a smaller replacement petrol tank. We will advise you of the best option for your vehicle.

LPG, CNG and Diesel Blend filling stations are readily available throughout the UK, as well as Europe, and new fill points are being added all the time. Visit our Fuelling Stations page to find out where your nearest filling station is located.

LNG is natural gas that has been cooled down to liquid form. This process reduces the volume and makes it much easier and safer for storage and transport.

Yes, all our conversions are safe. Compared with petrol, CNG and LPG is much safer. The gas is stored under pressure as a liquid and the tanks are able to withstand far greater impacts than your petrol tank can without rupturing. The systems incorporate a shut-off valve that automatically cuts off the fuel supply if you are unfortunate enough to be involved in a collision.

Find out more from our Blog article: How safe is driving on LPG (autogas)?

The converted car is bi-fuel so you can still run on petrol if the gas runs out. Most systems will automatically switch to petrol should you run out of LPG or you may have to manually switch to petrol.

Shown: Refuelling nozzle for LPG.

All conversions come with a free of charge 1,000 mile check. We also recommend an annual service or 15,000 mile service, which our network of installers can complete for you.

In terms of on going care, the ValveCare system is an electronically controlled dosing system for petrol engines (MPI, DPI, DI, DI-MPI) that have been converted to LPG or CNG. Together with the Prins ValveCare additive, the system aids to keep the combustion chamber cleaner, reduce wear of valves, valve seats and the petrol injectors. To find out more information and to buy bottles of ValveCare, please read:

Boats can be converted at selected dealers. See our Installers page or contact us for your local installer.

If you are refuelling in the UK, you do not need an adapter at the pump. However, if you are travelling in Europe, an adapter is needed as there are two different types of fuel nozzle. We do not provide the adaptors with the conversion kit but advise our customers that they are readily available on the internet and they should purchase one prior to travelling abroad. We do keep adaptors at our filling station in Winchester, just in case.

For help and advice on the best diesel blend conversion options for your HGV or fleet, please contact bruce@alternatech.co.uk in the first instance.

Shown: The Diesel Blend conversion demo truck.

Yes, but you should always check with your insurance company that they will insure a converted vehicle. The vast majority of insurance companies do, but as with all insurance policies, you will need to check the individual requirements and let them know of any changes to your vehicle.

Previously, LPG certificates were issued but these have been replaced by the UKLPG vehicle register, which all good insurance companies should already be aware of. Our installers will add your vehicle to this register as proof that the conversion has been completed by an approved conversion centre. Only approved conversion centres can add vehicles to the register.

You can either give us a call on 02380 446 467 with your car details to hand (ie make / model, year, engine size and, if possible, the number of cylinders) or you can check via our simple to use online vehicle checker: