2020 Genesis G70 vs. 2020 Mercedes A-Class

Detailed Review, Specifications & Comparison

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Safety

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For enhanced safety, the front seat shoulder belts of the Genesis G70 are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Mercedes A-Class doesn’t offer height-adjustable seat belts.

To help make backing safer, the G70’s cross-path warning system uses wide-angle radar in the rear bumper to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The A-Class doesn’t offer a cross-path warning system.

Both the G70 and the A-Class have standard driver and passenger frontal airbags, front side-impact airbags, driver knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, crash mitigating brakes, daytime running lights, rearview cameras, driver alert monitors, available all wheel drive and around view monitors.

For its top level performance in IIHS driver and passenger-side small overlap frontal, moderate overlap frontal, side impact, roof strength and head restraint tests, its standard vehicle-to-vehicle front crash prevention system, its standard vehicle-to-pedestrian front crash prevention system, and its standard headlight’s “Good” rating, the Insurance Institute for Highway Safety grants the G70 its highest rating: “Top Pick Plus” for 2020, a rating granted to only 31 vehicles tested by the IIHS. The A-Class has not been tested, yet.

Warranty

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The G70 comes with a full 5-year/60,000-mile basic warranty, which covers the entire car and includes free 24-hour roadside assistance. The A-Class’ 4-year/50,000-mile basic warranty expires 1 year and 10,000 miles sooner.

Genesis’ powertrain warranty covers the G70 6 years and 50,000 miles longer than Mercedes covers the A-Class. Any repair needed on the engine, transmission, axles, joints or driveshafts is fully covered for 10 years or 100,000 miles. Coverage on the A-Class ends after only 4 years or 50,000 miles.

The G70’s corrosion warranty is 2 years longer than the A-Class’ (7 vs. 5 years).

Genesis pays for scheduled maintenance on the G70 for 3 years and 36,000 miles. Genesis will pay for oil changes, lubrication and any other required maintenance. Mercedes doesn’t pay scheduled maintenance for the A-Class.

Reliability

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The battery on the G70 is in the trunk, which protects it from hot underhood temperatures that can degrade battery life. By keeping the G70’s battery 20 to 30 degrees cooler, its life is increased by years. The A-Class’ battery is in the hot engine compartment.

A reliable vehicle saves its owner time, money and trouble. Nobody wants to be stranded or have to be without a vehicle while it’s being repaired. Consumer Reports rates the G70’s reliability 58 points higher than the A-Class.

J.D. Power and Associates rated the G70 first among compact premium cars in their 2019 Initial Quality Study. The A-Class isn’t in the top three in its category.

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Genesis vehicles are better in initial quality than Mercedes vehicles. J.D. Power ranks Genesis first in initial quality, above the industry average. With 31 more problems per 100 vehicles, Mercedes is ranked 12th, below the industry average.

From surveys of all its subscribers, Consumer Reports’ December 2019 Auto Issue reports that Genesis vehicles are more reliable than Mercedes vehicles. Consumer Reports ranks Genesis 16 places higher in reliability than Mercedes.

Engine

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The G70 2.0T’s standard 2.0 turbo 4-cylinder produces 64 more horsepower (252 vs. 188) and 39 lbs.-ft. more torque (260 vs. 221) than the A-Class’ 2.0 turbo 4-cylinder. The G70 2.0T’s optional 2.0 turbo 4-cylinder produces 67 more horsepower (255 vs. 188) and 39 lbs.-ft. more torque (260 vs. 221) than the A-Class’ 2.0 turbo 4-cylinder. The G70 3.3T’s standard 3.3 turbo V6 produces 177 more horsepower (365 vs. 188) and 155 lbs.-ft. more torque (376 vs. 221) than the A-Class’ 2.0 turbo 4-cylinder.

As tested in Motor Trend the G70 2.0T 2.0 turbo 4-cylinder is faster than the Mercedes A-Class (automatics tested):

G70

A-Class

Zero to 60 MPH

6.2 sec

6.8 sec

Quarter Mile

14.7 sec

15.2 sec

Fuel Economy and Range

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To lower fuel costs and make buying fuel easier, the Genesis G70 uses regular unleaded gasoline (premium recommended for maximum performance). The A-Class requires premium, which can cost 20 to 55 cents more per gallon.

The G70 has 2.3 gallons more fuel capacity than the A-Class (15.8 vs. 13.5 gallons), for longer range between fill-ups.

Transmission

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An eight-speed automatic is standard on the Genesis G70, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the A-Class.

The G70’s launch control uses engine electronics to hold engine RPM’s precisely in order to provide the most stable and rapid acceleration possible, using all of the available traction. The A-Class doesn’t offer launch control.

Brakes and Stopping

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For better stopping power the G70 3.3T/6-speed’s brake rotors are larger than those on the A-Class:

G70 3.3T/6-speed

A-Class

Front Rotors

13.8 inches

12.6 inches

Rear Rotors

13.4 inches

11.6 inches

The G70’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the A-Class are solid, not vented.

The G70 stops much shorter than the A-Class:

G70

A-Class

70 to 0 MPH

151 feet

153 feet

Car and Driver

60 to 0 MPH

106 feet

125 feet

Motor Trend

Tires and Wheels

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For better traction, the G70 has larger standard tires than the A-Class (225/45R18 vs. 205/55R17).

The G70’s standard tires provide better handling because they have a lower 45 series profile (height to width ratio) that provides a stiffer sidewall than the A-Class’ standard 55 series tires. The G70 3.3T/2.0T Manual/Sport’s 255/35R19 rear tires have a lower 35 series profile than the A-Class’ optional 40 series tires.

For better ride, handling and brake cooling the G70 has standard 18-inch wheels. Smaller 17-inch wheels are standard on the A-Class.

The G70 has a standard space-saver spare (not available on 2.0T Manual) so you can replace a flat tire and drive to have the flat repaired or replaced. A spare tire isn’t available on the A-Class; 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 tire options on the A-Class don’t have a run-flat feature, either.

Suspension and Handling

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For a smoother ride and more stable handling, the G70’s wheelbase is 4.2 inches longer than on the A-Class (111.6 inches vs. 107.4 inches).

For better handling and stability, the average track (width between the wheels) on the G70 is 1.1 inches wider in the front and 2.9 inches wider in the rear than the track on the A-Class.

The G70 handles at .94 G’s, while the A 220 pulls only .87 G’s of cornering force in a Motor Trend skidpad test.

The G70 Standard executes Motor Trend’s “Figure Eight” maneuver 1.3 seconds quicker than the A 220 (25.2 seconds @ .75 average G’s vs. 26.5 seconds @ .68 average G’s).

Passenger Space

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The G70 has .8 inches more front legroom, 1.2 inches more front shoulder room, .9 inches more rear legroom and .6 inches more rear shoulder room than the A-Class.

Cargo Capacity

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The G70 has a much larger trunk than the A-Class (10.5 vs. 8.6 cubic feet).

To make loading and unloading groceries and cargo easier, especially for short adults, the G70 3.3T Prestige/3.3T Sport has a standard power trunk, which opens and closes automatically by pressing a button or just by waiting momentarily behind the back bumper, completely leaving your hands free. The A-Class doesn’t offer a power trunk.

Servicing Ease

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The engine in the G70 is mounted longitudinally (North-South), instead of sideways, as in the A-Class. This makes it easier to service and maintain, because the accessory belts are in front.

Ergonomics

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Consumer Reports rated the G70’s headlight performance “Good,” a higher rating than the A-Class’ headlights, which were rated “Poor.”

To shield the driver and front passenger’s vision over a larger portion of the windshield and side windows, the G70 has standard extendable sun visors. The A-Class doesn’t offer extendable visors.

Both the G70 and the A-Class offer available heated front seats. The G70 Prestige/Sport also has standard heated rear seats to keep those passengers extremely comfortable in the winter. Heated rear seats aren’t available in the A-Class.

Recommendations

© 1999 - 2020 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. 6IUEX-0KENZ 45.55.47.189 2020/08/10

Consumer Reports® recommends the Genesis G70, based on reliability, safety and performance. The Mercedes A-Class isn't recommended.

The G70 was chosen as one of Car and Driver’s “Top Ten” in 2019. The A-Class has never been a Car and Driver “Top Ten” pick.

Motor Trend selected the G70 as their 2019 Car of the Year. The A-Class has never been chosen.

© 1991-2018 Advanta-STAR Automotive Research. All rights reserved.

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