Certified Benz & Beemer Compares 2007 Mercedes Benz SL-Class VS 2007 BMW 3 Near Scottsdale, AZ

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2007 Mercedes Benz SL-Class

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VS

2007 BMW 3

Safety Comparison

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Both the SL Class and the 3 Series Convertible have standard driver and passenger frontal airbags, front side-impact airbags, head airbags, front seatbelt pretensioners, height adjustable front shoulder belts, four wheel antilock brakes, traction control and electronic stability systems to prevent skidding.

Engine Comparison

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The SL Class has more powerful engines than the 3 Series Convertible:

Horsepower

Torque

SL550 5.5 DOHC V8

382 HP

391 lbs.-ft.

SL55 AMG 5.4 supercharged V8

510 HP

531 lbs.-ft.

SL600 5.5 turbo V12

510 HP

612 lbs.-ft.

SL65 AMG 6.0 turbo V12

604 HP

738 lbs.-ft.

328i Convertible 3.0 DOHC 6 cyl.

230 HP

200 lbs.-ft.

335i Convertible 3.0 turbo 6 cyl.

300 HP

300 lbs.-ft.

Fuel Economy and Range Comparison

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An engine control system which can shut down half of the engine’s cylinders helps improve the SL Class V12’s fuel efficiency. The 3 Series Convertible doesn’t offer a system which can shut down part of the engine.

The SL Class has 5 gallons more fuel capacity than the 3 Series Convertible (21.1 vs. 16.1 gallons), for longer range between fill-ups.

Brakes and Stopping Comparison

© 1999 - 2021 Advanta-STAR Automotive Research. All rights reserved. This vehicle comparison and all of the content in it are provided only by license from Advanta-STAR Automotive Research Corporation of America. If you are not a legally licensed user of this vehicle comparison, it is against federal law to access it, copy it, forward it or use it in any manner whatsoever. Any unauthorized use of this vehicle comparison is a violation of U.S. and international law and is punishable criminally and civilly. RMDYB-MXOUX 162.241.241.35 2021/03/30

For better stopping power the SL Class’ brake rotors are larger than those on the 3 Series Convertible:

SL550

SL65 AMG

328i Convertible

335i Convertible

Front Rotors

13.8 inches

15.4 inches

12.3 inches

13.7 inches

Rear Rotors

12.6 inches

14.2 inches

11.8 inches

13.2 inches

Tires and Wheels Comparison

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For better traction, the SL Class has larger tires than the 3 Series Convertible (F:255/40R18 & R:285/35R18 vs. 225/45R17). The SL Class’ tires are larger than the largest tires available on the 3 Series Convertible (F:255/40R18 & R:285/35R18 vs. F:225/40R18 & R:255/35R18).

The SL Class’ standard 255/40R18 front and 285/35R18 rear tires provide better handling because they have a lower 40 series front and 35 series rear profile (height to width ratio) which provides a stiffer sidewall than the 328i Convertible’s standard 45 series tires. The SL55/SL65’s 255/35R19 front and 285/30R19 rear tires have a lower 35 series front and 30 series rear profile than the 3 Series Convertible’s optional 40 series front and 35 series rear tires.

For better ride, handling and brake cooling the SL Class has standard 18 inch wheels. Smaller 17 inch wheels are standard on the 328i Convertible. The SL55/SL65’s 19 inch wheels are larger than the 18 inch wheels optional on the 3 Series Convertible.

The SL Class has a standard space-saver spare tire so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the 3 Series Convertible, it requires you to depend on its run-flat tires, which limits mileage and speed before they are repaired. If a run-flat is damaged beyond repair by a road hazard your vehicle will have to be towed. Some models of the 3 Series Convertible don’t even offer run-flats.

Suspension and Handling Comparison

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The SL Class offers an available adjustable active suspension system, which counteracts cornering forces actively, limiting body roll and improving handling and stability. BMW doesn’t offer an active suspension on the 3 Series Convertible.

The SL Class has a standard driver-adjustable suspension system. It allows the driver to choose between an extra-supple ride, reducing fatigue on long trips, or a sport setting, which allows maximum control for tricky roads. The 3 Series Convertible’s suspension doesn’t offer adjustable shock absorbers.

The SL Class has a standard automatic front and rear load leveling suspension to keep ride height level with a heavy load or when towing. The 3 Series Convertible doesn’t offer a load leveling suspension.

For better handling and stability, the average track (width between the wheels) on the SL Class is 2.5 inches wider in the front and 1.2 inches wider in the rear than the track on the 3 Series Convertible.

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