BMW 1-Series Convertible (2011)

2011 BMW 1-Series Convertible

The 2011 1-Series convertible from BMW is a nimble sports car that lets in the sun. The rear-wheel-drive drop-top comes in three variations with two drive train choices. The 128i and 128i SULEV versions share the same smooth revving six-cylinder engine that puts out 230 horsepower. The 135i comes with a more powerful, turbocharged six-cylinder engine and additional performance improvements.

All three trim levels of the 1-Series class of BMWs come with a six-speed manual transmission as standard equipment. The 128i and 128i SULEV cars have an option for a six-speed automatic, and the 135i can be ordered with a seven-speed dual-clutch automatic.

Common to all trim levels of the 1-Series convertible are an AM/FM/CD/MP3 audio with auxiliary input, light weight alloy wheels, no-cost leather seats, fold-down rear seats, dual-zone automatic climate control, and 8-way adjustable front seats. And naturally, BMW offers many additional options. 

The 128i Convertible is powered by BMW's 3.0-liter, 230 horsepower inline six-cylinder engine generating 200 pound-feet of torque.

Like its fixed-roof stablemate, the 128i Convertible features Valvetronic valvetrain management and aluminum/magnesium cylinder block construction-core elements of BMW's EfficientDynamics.

The 135i Convertible, features BMW's twin-turbocharged 3.0-liter inline six-cylinder engine producing 300 horsepower and 300 pound-feet of torque from as low as 1,400 rpm.

With its direct piezo gasoline injectors, twin low-mass turbochargers and air-to-air intercooling, the 135i Coupe accelerates to 62 mph in 5.3 seconds. while the Convertible takes 5.6 seconds. Both engines feature on-demand engine coolant pumps that improve fuel economy and reduce parasitic losses for increased output.

BMW 1 Series 135i Convertible Engine

Standard Engine 3.0L I6
Standard Transmission 6 Speed Manual
Cylinders 6
Horsepower @RPM 300@5800
Fuel Economy Cty/Hwy 17 / 26
Combined Fuel Economy 20
EPA Class Sub-Compact
Number of Valves 24
Fuel Type System Gas Engine / Electronic Fuel Injected
Turbo (Yes/No) Yes
Overdrive Transmission Yes
Compression 10.2:1
Displacement 2979 / 182
Bore X Stroke 3.31×3.53
Cruising Range 280 miles
Power to Weight Ratio 12.2
Final Drive Ratio Yes
Valves Configuration Dual Overhead Cam / Twin Overhead Cam

Standard FeaturesAnti-Theft & Locks

o Vehicle Anti-Theft Via Double Locking and Engine Immobilizer
o Power Door Locks Operated Via Internal Switch
o Locking Fuel Filler Door
o Selective Unlocking
o Radio Anti-Theft

Braking & Traction

o Dynamic Traction Control
o Rear Electronic Limited Slip Differential
o Brake Drying
o Front Power 338-mm Ventilated Disc and Rear Power 325-mm Ventilated Disc Brakes
o Brake Standby
o Brake Fade Compensation
o Dynamic Stability Control (DSC) Vehicle Stability Control System Operated Via ABS and Traction Control Measures Steering Wheel Angle, Yaw Rate, Wheel Speed and Lateral Acceleration
o Electronic Brake Force Distribution
o Electronic Brake Assistance
o Hill Start Control
o 4-Wheel Anti-Lock Brakes

Electrical

o Cigarette Lighter
o Drive-By-Wire Control For Throttle
o Front Power Outlet Integrated With Cigarette Lighter
o Audio, Telephone and Security Pre-Wiring
o Battery

Engines & Emissions

o Twin-Turbocharger
o Turbocharged 3.0-Liter, I6, Double-VANOS 24-Valve, DOHC, EFI Engine; Front/Longitudinal Mounted With Horsepower Of 300@5800, Torque Of 300@1400, Alloy Block and Alloy Cylinder Head
o BMW Ultimate Service(TM) Free Scheduled Maintenance For 48 Months or 50,000 Miles

Entertainment, Communication & Navigation

o AM/FM Radio With 10 Speakers Total; CD Player; MP3 Player
o Radio Data System
o Diversity Radio Antenna
o Front Auxiliary Audio Input Jack

Exterior Lighting

o Cornering Lights
o Adaptive Xenon High Intensity Discharge Headlights With Automatic Leveling
o Programmable Daytime Running Lights
o Automatic Headlights
o Retractable High Pressure Headlight Washers
o Variable Intensity Brake Lights