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Green Drives

Lotus Exige 270E Tri-Fuel driven

By Jesse Crosse

First drive

28 April 2008 10:16

At 270bhp, this is the most powerful Exige Lotus has ever built yet it is also one of the most environmentally friendly. The Exige 270E Tri-Fuel, to give it its full title, has been produced by research engineers at Lotus Engineering to demonstrate how straightforward it can be to develop high performance carbon neutral vehicles using sustainable liquid fuel.

The 270E can run on either petrol, ethanol or methanol or a blend of all three if necessary. It forms part of a research program looking into the technicalities associated with burning mixtures of petrol and alcohol fuels and since the Exige is already supercharged, also dovetails neatly with the trend towards downsizing by using smaller capacity boosted engines to improve efficiency.

A green Lotus Exige? How can that be any fun?

Oh, it’s fun. On Lotus’s southern test track the Exige quickly demonstrated just how potent it is. Cruising at low throttle openings the engine sounds quite innocuous, although because it’s close-by behind the seats a few unfamiliar noises like the clicking of injectors circulate freely around the cabin.

But squeeze the throttle hard and the Toyota-Yamaha engine swiftly delivers a fierce punch in the back, the buzz of the supercharger increasing in volume along with a rush of intake air as the Exige pelts towards the horizon at a blistering rate. 

It’s proper race car stuff. Short-shift gear stick, six closely-spaced gear ratios, hugely powerful AP Racing brakes, a steering wheel kicking gently in the hands and lots of noise. The Exige’s huge grip and near perfect balance complete an intoxicating package.

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Need to know

CAR's rating

rating is 5

Handling

rating is 5

Performance

rating is 5

Usability

rating is 3

Feelgood factor

rating is 5

Readers' rating

rating is 3.5

Statistics

On sale in the UK: Five years, hopefully
Engine: 1796cc 4-cyl 16V supercharged, 270bhp @ 8000rpm, 184lb ft @ 5,500rpm
Transmission: Six-speed manual, rear-wheel drive
Performance: 3.88sec 0-60mph, 158mph
How heavy / made of? 930kg/aluminium, composite
How big (length/width/height in mm)? 3785/1850/1170

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Lotus Exige 270E Tri-Fuel driven

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JohnnyBimmer

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JohnnyBimmer says

RE: Lotus Exige 270E Tri-Fuel driven

JonesG - forgive me my scepticism but you've a 'readily available material' to seperate hydrogen from water but it's mainly found in Oz, Turkey and India. Que.1. This secret "Material Z" once it is 'in demand' as an energy source will increase in price significantly based on the demand won't it - it won't be so cheap once it's in demand, probably by a mulitple of 5 to 10 especially if only 3 countries have a stranglehold on supply (oil is produced in nearly 100 countries) right? Next the power generation can be "fitted in a 20ft container" and plugged into existing power stations. Mmmm?! Que.2. So the huge seperation of water to hydrogen and mixing with your Material.Z doesn't happen inside this 20ft container does it? You cannot seperate water, mix the hydrogen with M.Z in commercial quanities and release the power all from a 20ft container! You're cannot include the refining process in your 20ft. So Que.3. How big is the refinery and how do you plan to move it in large enough quantities to your 20ft container.. in trucks? Lastly your process involves 'dismantling water'. Water is not a scarce resource as global hysterics purport. But if you're consuming large quantites of water (ie. seperating the "H" in H2O and losing H2O) in big commercial quantities to power worldwide power stations (and not replenishing water) you're doing what Ethanol is to corn prices, namely driving up water prices! So Que.4. How much water is destroyed to power your your 20ft container engine and run a typical power station? Finally if you triple your M.Z price, increase water price by say 30% and count all the waste and refining costs... Que.5. what is the end cost per kilowat of energy?

11 May 2008 15:19

jonesg

jonesg says

RE: Lotus Exige 270E Tri-Fuel driven

Cant argue with JohnnyBimmer on the physics. But as I have a very large government grant to do as I suggested will pass on the following clues. I also note no one from Lotus put pen to paper. The hydrogen is separated by no current existing power source. The process is fuelled by a substance that Australia has the largest resources of, followed VERY closely by India with Turkey a distant third. The entire power source, which will drive a very large power station, fits inside a 20ft. container. We use the material in its pure form. There is no danger of explosion, meltdown etc. etc. and the by-product, which is very low grade, has a life span of 500 years before it completely decays. It is not capable of making nuclear weapons. There is enough material to power all existing, and planned power stations, including both India and China for over 500 years. By which time I wont care. We plug in our new power generator in its container into any existing power station and basically remove coal, oil, gas, and nuclear as an energy source. Its cheap to build and very cheap to run. On the hydrogen as a fuel. The substance we are developing absorbs the hydrogen at very low pressure and releases it at near the same pressure. You dont need to compress it. If it all works you will know in about 3 years.

30 April 2008 05:59

JohnnyBimmer

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JohnnyBimmer says

RE: Lotus Exige 270E Tri-Fuel driven

JonesG - Hydrogen = 30,000 BTUs, Gasoline = 125,000 BTUs, Diesel = 130,000 BTUs (per gallon).... Producing hydrogen has a high energy cost. Compressing hydrogen gas into a 'realistically' confined area has another large energy cost. Transporting, storing and distributing a gaseous fuel as opposed to a liquid raises big problems. Finally it will cost $billions to develop hydrogen fuel cells that can match the performance of today's gasoline engines. So even if you can solve all these hydrogen problems improvements to current petrol and diesel cars are more than 100 times cheaper than persuing hydrogen cars (which Mercedes has been doing without success for decades) at reducing air pollution.

30 April 2008 02:36

JohnnyBimmer

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JohnnyBimmer says

RE: Lotus Exige 270E Tri-Fuel driven

TRI-Fuel Lotus - Let's start with Ethanol. It costs more in energy to make it than it gives in your tank. No matter where your source (corn, cane, grass or tree bark) it also has half the energy value of petrol or diesel. Goodbye TRI. BI-Fuel Lotus - Methanol is also energy expensive to produce and has a low calorific value in your tank. But what the CAR article doesn't state is it's the Alchahol inhanced stuff. Imagine petrol but twice as costly. Bye Bye Bi-Fuel. Which leaves you with a viable 270bhp supercharged petrol Elise with a bloody expensive multi-fuel engineered engine. Talk about going round the houses to get back to square one!!!

29 April 2008 23:58

jonesg

jonesg says

RE: Lotus Exige 270E Tri-Fuel driven

Hang on a minute. You combine hydrogen with co2 from the atmosphere to make methanol, and someone thinks thats efficient. You need a cheap, clean energy source to split hydrogen from sea water. Thats actually available now and its cheap and very clean. If Lotus want to know they can just ask and we can talk. But then you take your hydrogen through another process or 3 or 4 to make Methanol. Anyone figure the flaw here. Because it is blindingly obvious. You already have your energy source in the hydrogen. Before Lotus go, but how do you store the hydrogen and what is the cost of the storage system for vehicles?, again just ask boys because someone in the UK is already working on that and may just have the answer. Also lets forget ethanol if its not made from replaceable trees. Because if its made from either an human or animal food product and is forcing up prices world wide for such foodstuffs its not going to be acceptable for much longer.

29 April 2008 06:14

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