2020 Mercedes AMG SLC vs. 2020 Audi TT

Detailed Review, Specifications & Comparison

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Safety

© 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 2020/02/29

The AMG SLC’s optional pre-crash front seatbelts will tighten automatically in the event the vehicle detects an impending crash, improving protection against injury significantly. The TT doesn’t offer pre-crash pretensioners.

The AMG SLC has standard NECK-PRO Head Restraints, which use a specially designed headrest to protect the driver and front passenger from whiplash. During a rear-end collision, the NECK-PRO Head Restraints system moves the headrests forward to prevent neck and spine injuries. The TT doesn’t offer a whiplash protection system.

The AMG SLC has a standard Active Brake Assist, which uses forward mounted sensors to warn the driver of a possible collision ahead. If the driver doesn’t react and the system determines a collision is imminent, it automatically applies the brakes at full-force in order to reduce the force of the crash or avoid it altogether. The TT doesn't offer collision warning or crash mitigation brakes.

The AMG SLC’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane. The TT doesn’t offer a lane departure warning system.

The AMG SLC’s driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The TT doesn’t offer a driver alert monitor.

Both the AMG SLC and the TT have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras and available rear parking sensors.

Warranty

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There are over 26 percent more Mercedes dealers than there are Audi dealers, which makes it easier should you ever need service under the AMG SLC’s warranty.

Reliability

© 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 2020/02/29

J.D. Power and Associates’ 2019 Initial Quality Study of new car owners surveyed provide the statistics that show that Mercedes vehicles are better in initial quality than Audi vehicles. J.D. Power ranks Mercedes 12th in initial quality. With 12 more problems per 100 vehicles, Audi is ranked 22nd.

Engine

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The AMG SLC’s 3.0 turbo V6 produces 157 more horsepower (385 vs. 228) and 126 lbs.-ft. more torque (384 vs. 258) than the TT 45 TFSI’s standard 2.0 turbo 4-cylinder. The AMG SLC’s 3.0 turbo V6 produces 97 more horsepower (385 vs. 288) and 104 lbs.-ft. more torque (384 vs. 280) than the TTS’ standard 2.0 turbo 4-cylinder. The AMG SLC’s 3.0 turbo V6 produces 30 lbs.-ft. more torque (384 vs. 354) than the TT RS Coupe’s standard 2.5 turbo 5-cylinder.

Fuel Economy and Range

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The AMG SLC has 1.4 gallons more fuel capacity than the TT (15.9 vs. 14.5 gallons), for longer range between fill-ups.

Transmission

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A nine-speed automatic is standard on the Mercedes AMG SLC, for better acceleration and lower engine speed on the highway. Only a seven-speed automatic is available for the TT.

Brakes and Stopping

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For better stopping power the AMG SLC’s standard brake rotors are larger than those on the TT:

AMG SLC

TT

Front Rotors

14.2 inches

12.3 inches

Rear Rotors

13 inches

11.8 inches

The AMG SLC’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs standard on the TT 45 TSFI are solid, not vented.

Tires and Wheels

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For better traction and acceleration, the AMG SLC has larger rear tires than the TT (255/35R18 vs. 245/40R18).

The AMG SLC’s 255/35R18 rear tires provide better handling because they have a lower 35 series profile (height to width ratio) that provides a stiffer sidewall than the TT 45 TSFI’s standard 40 series tires.

Suspension and Handling

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The AMG SLC has standard front and rear gas-charged shocks for better control over choppy roads. The TT’s suspension doesn’t offer rear gas-charged shocks.

Chassis

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The AMG SLC’s standard power retractable hardtop allows a seamless transition from an open car, to a completely sealed coupe. The TT doesn’t offer a retractable hardtop.

Cargo Capacity

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With its convertible body style, valet key and remote trunk release lockout, the AMG SLC offers cargo security. The TT’s non-lockable folding seat and non-lockable remote release defeat cargo security.

Servicing Ease

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J.D. Power and Associates surveys of service recipients show that Mercedes service is better than Audi. J.D. Power ranks Mercedes fifth in service department satisfaction. With a 13% lower rating, Audi is ranked 8th.

Ergonomics

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When three different drivers share the AMG SLC, the memory system makes it convenient for all three. Each setting activates different, customized memories for the driver and front passenger’s seat positions, steering wheel position and outside mirror angle. The TT doesn’t offer a memory system.

The AMG SLC’s standard easy entry system raises the steering wheel, making it easier for the driver to get in and out. The TT doesn’t offer an easy entry system.

In case of a sudden change of weather, the AMG SLC has a standard remote convertible top that can be raised from a distance to protect the interior of the vehicle from damage. The TT doesn’t offer a remote top, so the driver will have to run to the car, get in, turn the ignition on and raise the top to prevent the interior from being damaged.

In poor weather, headlights can lose their effectiveness as grime builds up on their lenses. This can reduce visibility without the driver realizing. The AMG SLC offers available headlight washers to keep headlight output high. The TT doesn’t offer headlight washers.

While driving with high beams on, sensitive light sensors standard on the AMG SLC detect other vehicles which could be blinded and automatically switch to low beams. The TT doesn’t offer automatic dimming high beams.

The TT’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The AMG SLC’s standard adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.

The AMG SLC’s standard dual zone air conditioning allows the driver and front passenger to choose two completely different temperatures so people with different temperature preferences won’t have to compromise. This makes both the driver and front passenger as comfortable as possible. The TT doesn’t offer dual zone air conditioning.

To keep a safe, consistent following distance, the AMG SLC offers an optional Active Distance Assist Distronic, which alters the speed of the vehicle without driver intervention. This allows the driver to use cruise control more safely without constantly having to disengage it when approaching slower traffic. The TT doesn’t offer an adaptive cruise control.

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