Category Technical Talk

Luxury sedan AWD system review – part 1

For US market luxury brands, most of their upscale sedans offer the AWD option nowadays. However, not all AWD systems are created equal. Before our review, let’s look at what goes into a luxury sedan AWD system.

Differential: this is a device to let both sides of output rotate at a different speed, and still obtain torque. For example in your front-wheel-drive car, your front wheels are connected with a differential.

Open differential: when one side of output loses traction, there will be no torque available at another side at all...

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Media road test: BMW M235i vs. Mercedes CLA45 AMG vs. Subaru WRX STI

This road test comes from MotorTrend’s 2014 June Issue.

Note: If you cannot see the whole table when you are browsing using iPhone, you can turn your phone by 90 degree and view the full width version of the table.

2014 BMW M235i 2014 Mercedes Benz CLA45 AMG 2015 Subaru WRX STI (Launch Edition)
DRIVETRAIN LAYOUT Front-engine, RWD Front-engine, AWD Front-engine, AWD
ENGINE TYPE Turbocharged I-6, alum block/head Turbocharged I-4, alum block/head Turbocharged flat-4, alum block/heads
VALVETRAIN DOHC, 4 valves/cyl DOHC, 4 valves/cyl DOHC, 4 valves/cyl
DISPLACEMENT 181.8 cu in/2979 cc 121.5 cu in/1991 cc 149.9 cu in/2457 cc
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