BMW 135i Service Manual download pdf (Page 14)

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.

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.

BMW engines deliver power and performance with unsurpassed smooth-

ness and efﬁ ciency. Small wonder they have been winning accolades

and awards from the automotive press for years.

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

5.0 seconds.

Thanks to BMW’s award-winning engine expertise, turbo

lag is virtually a thing of the past. By using High Precision Injection,

every ounce of fuel is maximized for greater efficiency, with reduced

emissions.

The naturally aspirated, 230-hp inline six in the 128i is capable of produc-

ing 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 6.1 seconds.

BMW’s advanced Valvetronic

technology lets the engine “breathe” better, for greater power, higher

torque, quicker engine response, a smoother idle and enhanced fuel

efficiency. 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 a 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 equip-

ped 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 transmission combi-

nation you choose, innovative BMW engineering makes it possible to

enjoy outstanding power and performance with reduced emissions and

fewer trips to the pump.

7-speed Double Clutch Transmission; 5.1 seconds, manual. BMW AG test results. BMW urges you to

obey all posted speed laws and always wear safety belts.

Manual transmission; 6.7 seconds, STEPTRONIC automatic. BMW AG test results. BMW urges you to

obey all posted speed laws and always wear safety belts.

BMW’S REVOLUTION IN POWER

TURBOCHARGES YOUR FUN.

Output (horsepower)

Tor que (lb -ft )

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Engine speed (rpm)

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Power output (horsepower)

Torque (lb-ft)

BMW’s TwinPower Turbo technology in

the 135i delivers immediate power and

torque, as well as increased fuel efficiency

and reduced emissions.

BMW Efﬁ cientDynamics

Less emissions. More driving pleasure.

Engine 26 | 27

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BMW 135i Service Manual Page 14

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