BMW engines have been winning accolades from the press for years.
Beneath the long hoods of the 128i and 135i Convertibles lie two of
the world’s most sophisticated 3.0-liter inline six-cylinder powerplants.
Lightweight engine blocks, as well as Double-VANOS and Valvetronic
technology enhance their smooth power delivery, fuel ef⇒ ciency and
lowered emissions. Advanced Valvetronic technology lets the engines
“breathe” better, for greater power, higher torque, quicker response,
a smoother idle and enhanced efficiency.
For its bravura performance, the 135i for 2011 draws upon BMW’s
new TwinPower Turbo – the first engine in the world to combine
turbocharging, High Precision Injection, and Valvetronic technology.
This twin-scroll wonder develops 300 lb-ft of torque at just 1200 rpm
and continues all the way to 5000 rpm. It’s a force that throws you back
in your seat right from the start and doesn’t let up. With 300 horses on
tap, the 135i can sprint from 0 to 60 mph in 5.3 seconds,
1
and has an
electronically limited top speed of 130 mph. Thanks to BMW’s award-
winning engine expertise, turbo lag is a thing of the past. By using a
high-precision piezo fuel-injection system, every ounce of fuel is
maximized for greater efficiency, while CO
2
emissions are reduced.
The naturally aspirated, 230-hp inline six in the 128i is capable of
producing 200 lb-ft of torque at 2750 rpm, for power that pours on
early and strong and continues throughout the powerband. Hit the
accelerator and you’re sailing past 60 mph in 6.4 seconds.
2
The
lightweight composite magnesium/aluminum engine block adds to
the 128i’s spirited acceleration and nimble handling.
Both models offer, as standard, a silky-shifting 6-speed manual. The
135i can also be ordered with 7-speed Double Clutch Transmission
(DCT) for lightning-quick shifts; in the 128i,
STEPTRONIC automatic
with Adaptive Transmission Control is available. When either model is
equipped with the optional transmission – and, in the 128i, either the
Sport Package or M Sport Package – steering wheel-mounted paddle
shifters are automatically added. But whichever engine and transmis-
sion combination you choose, innovative BMW engineering makes it
possible to enjoy outstanding power and performance with reduced
emissions and fewer trips to the pump.
1
7-speed Double Clutch Transmission; 5.4 seconds, manual. BMW AG test results.
BMW urges you to obey all posted speed laws and always wear safety belts.
2
Manual transmission; 7.0 seconds, STEPTRONIC automatic. BMW AG test results.
BMW urges you to obey all posted speed laws and always wear safety belts.
MOVING ENGINE TECHNOLOGY TOWARD THE FUTURE.
High Precision Injection: Piezo injectors positioned close to the spark
plugs in the 135i ensure lean-burn operation under partial loads. To
provide optimum combustion, the fuel is injected at high pressure into
the cylinders, up to 200 times per fraction of a second. This means that
only part of the combustion chamber is filled with an ignitable fuel/air
mixture, so fuel is used extremely efficiently.
360
330
300
270
240
210
180
150
120
90
60
30
0
323
296
269
242
215
188
161
134
107
80
53
26
0
Portrait of an engineering masterpiece: The 135i TwinPower Turbo
engine produces 300 hp at 5800 rpm, and quickly develops 300 lb-ft
of torque at just 1200 rpm, which continues, without fading, to the
5000 rpm range. With such a broad range of powerful torque, you can
enjoy smooth, robust acceleration in any gear, at any speed.
Output (horsepower)
Tor qu e (l b-f t)
0 1000 2000 3000 4000 5000 6000 7000
Engine speed (rpm)
Output (horsepower)
Tor que (lb -f t)
