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| “This
engine is one of the few ways that the
MINI could have been made better”
Jeroen Jongeneel, De Telegraaf
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BMW’s strength in the International
Engine of the Year Awards continues with this gem. The Cooper
S unit replaces the previous supercharged design, itself a 2003
International Engine of the Year Award winner, with a lighter,
powerful, and more economical turbocharged engine.
The all-new four-cylinder gasoline
unit, developed in partnership with PSA Peugeot Citroën,
is constructed from
light alloy and features a twin-scroll
turbocharger, gasoline direct injection, twin overhead camshafts,
roller-type drag arms optimised for minimum friction,
and hydraulic valve play compensation
elements. The outlet valves are filled
with sodium to aid cooling, while the intake camshaft comes
with infinite phase adjustment, setting the engine’s valve
timing to the driver’s power and performance requirements.
All this technology delivers peak
output of 175bhp at 5,500rpm, and
a specific output of 109.5bhp/litre.
The maximum torque is 240Nm,
maintained consistently throughout the speed range from 1,600
to 5,000rpm. Under acceleration, torque is increased to 260Nm
by an overboost function, which enhances charge pressure, working
exclusively on engine torque. Average fuel consumption of 6.9L/100km
(40.9mpg) rounds off the Award-winning package.
“The principle to achieve the same
output as a larger engine on a smaller and more fuel-efficient
power unit is referred to as ‘downsizing’,”
states Erich Sonntag, MINI drivetrain project manager. “With
its specific output of approximately 110bhp-per-litre, the turbocharged
power unit of the new MINI is a wonderful example of this philosophy.” |
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points |
| 1. BMW-PSA 1.6-litre Turbo (Cooper S, Peugeot
207) |
267 |
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| 2. Toyota Hybrid 1.5-litre (Prius) |
251 |
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| 3. Audi 1.8-litre Turbo FSI (A3) |
82 |
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| 4. Peugeot-Citroën/Ford Diesel 1.6-litre
(Fiesta, Ford C-Max, Citroën C4, C4 Picasso C5, Mazda 3,
Peugeot 1007, 206, 307, Partner) |
74 |
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| 5. Honda 1.8-litre (Civic, Stream, FR-V) |
65 |
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| 6. Mercedes-Benz 1.8-litre Supercharged (C,
SLK, CLK, E) |
62 |
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|
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Scoring | Previous
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