The Lotus Exige 265E runs on environmentally friendly Bio Fuel!
Lotus Engineering, the engineering consultancy division of Group Lotus Plc
has developed a
bio-ethanol E85 version of the Lotus Exige.
The research vehicle is a true Lotus (it weighs just 930 kg unladen) and
is called the Lotus Exige 265E. 265 indicates the approximate horsepower
and is consistent with the naming strategy of other one-off and limited
run Lotus variants such as the Lotus Sport Exige 240R; the E indicates the
environmentally favourable bio-ethanol E85 fuel (85% ethanol alcohol and
15% petrol / gasoline) that powers this extremely high performing
sportscar.
Key to this performance is a slightly modified version of the 2ZZ VVTL-i
supercharged and intercooled high revving 4-cylinder engine from the
standard Lotus Exige S. This now gives an estimated set of performance
figures that would thrash the majority of “Super-Unleaded” performance
cars: 0-60 mph in 3.88 seconds, 0-100 mph in 9.2 seconds and a top speed
of 158 mph! In fact, the Lotus Exige 265E is probably the world’s quickest
road-legal E85 bio-ethanol car.
Key changes have been made to the fuel system, the engine calibration and
the four fuel injectors mounted on the inlet manifold have been enlarged.
Two additional fuel injectors have been fitted at the supercharger inlet
to increase the amount of fuel being injected in to the engine under
higher engine loads and to further cool the charge air prior to
combustion.
What is Bio Ethanol E85?
Bio-ethanol E85 is a fuel which is a mixture of 85% ethanol (an alcohol)
and 15% petrol / gasoline. The bio-ethanol can be made from bio-mass plant
crops such as cereals, sugar beet, sugar cane and wood. As these plant
crops grow, they absorb carbon dioxide from the atmosphere, which then
partly offsets the carbon dioxide (CO2) emissions produced during the
burning of the bio-ethanol fuel in the car’s engine.
The Benefits of Bio-Ethanol
The beauty of ethanol is its ability to produce more power in the engine
than with conventional
petrol / gasoline fuel. The Lotus Exige 265E now produces 264 hp (197 kW,
268 PS) at 8000 rpm, and 184 lb-ft (249 Nm) of torque (at 5500 rpm), up by
46 hp (34 kW, 47 PS) or 21% and 25 lb-ft (34 Nm) or 16% over the standard
petrol / gasoline Exige S. With the total weight of approximately 930 kg (unladen),
the power to weight is approximately 283 hp / tonne (211 kW / tonne, 287
PS / tonne
Ethanol has less stored energy per unit volume than gasoline so the fuel
economy is less, however as E85 ethanol is 85% sourced from renewable bio
matter, there is a net reduction in carbon dioxide (CO2)