When it comes to cars, beauty is sometimes in the eye of the beholder. For some, the sleek lines, elegant curves, and aerodynamic designs define a vehicle’s allure. But for others, beauty lies beneath the hood, where a powerful, finely tuned engine takes center stage. Here are 15 cars whose engines speak louder than their exterior.

Volkswagen Phaeton

The Phaeton’s design is often described as “boring” or “drab.” It certainly doesn’t scream for attention like some of its flashier competitors. Instead, it embodies a quiet dignity. However, the exterior is complemented by engine options, including the 3.6-liter V6 and an impressive 420-horsepower W12 engine.

Chevrolet Impala SS  

What the 1994–1996 Chevrolet Impala SS models lack in looks, they’ve more than made up for in performance. The body features a simple, boxy shape with minimal embellishments. Yet, its formidable LT1 V8 engine churns out a powerful 260 horsepower and 330 lb-ft of torque.

Mercury Marauder

The Mercury Marauder is another good reminder not to judge a book by its cover. It carries the familiar wide-bodied look of the Mercury Grand Marquis, which some might describe as unremarkable. However, the Marauder’s true magic lies beneath the hood, where a 302-horsepower 4.6-liter V8 engine awaits.

Buick Roadmaster

The Buick Roadmaster is a classic example of a car that defies expectations. Beneath its hood lies some of Buick’s most potent engines, including the legendary 260-horsepower LT1 V8, present in recent models. This ample powerhouse is veiled by a conservative exterior that lacks curves and aggressive styling.

Pontiac Grand Prix GXP

The Pontiac Grand Prix GXP’s design lacks the flamboyance expected from a vehicle housing impressive performance credentials. Its understated appearance contrasts sharply with the 5.3-liter V8 engine, producing an impressive 303 horsepower and 323 lb-ft of torque. This engine combines with sport-tuned suspensions and a front-wheel-drive layout.

C6 Audi S6

With its sleek sedan silhouette, subtle curves, and conservative lines, the C6 Audi S6 blends seamlessly into the background of everyday traffic. What readily meets the eye is its 435-horsepower 5.2-liter V10 engine, which enables the car to accelerate to 60 mph in 4.8 seconds.

Chrysler 300 SRT-8 (2008-2010)

Critics describe the Chrysler 300 SRT-8 as a mildly unattractive muscle sedan with an aggressive stance inferior to its rivals. Still, the car’s formidable 6.1-liter HEMI V8 engine that churns out an impressive 425 horsepower and 420 lb-ft of torque is enough to silence any misgivings.

Subaru Forester XT (2003-2008)

Equipped with a 230-horsepower 2.5-liter turbocharged engine, this SUV delivers impressive performance that can rival many sports cars. Models produced between 2003 and 2008 have practical features like a tall windshield for excellent visibility and a spacious interior. Their overall aesthetic feels more like a functional appliance than a stylish SUV.

Lincoln Town Car (1998-2011)

With its flat body sides, sharp-edged fenders, and a somewhat dated radiator-style grille, the Town Car’s aesthetics feel lackluster compared to more modern vehicles. But don’t be fooled. Under the hood lies a potent 280-horsepower 4.6-liter V8 engine that connects with a four-speed automatic transmission.

Chevy SS (2014-2017)

To some people, Chevrolet SS models released from 2014 to 2017 resemble a rebranded Holden Commodore VF rather than a standout performance vehicle. This exterior, however, does not match what lies under the hood. The car has an ample 415-horsepower 6.2-liter V8 engine, delivering 415 lb-ft of torque.

Toyota Camry V6

There is no middle ground between the Toyota Camry V6’s unremarkable looks and its powerful engines. While the car lacks the sporty flair some competitors offer, its 268-horsepower 3.5-liter V6 engine makes all the difference, propelling the car from 0 to 60 mph in 6 seconds.

Volkswagen Passat W8

Owners of the Volkswagen Passat W8 are happy to trade off looks for performance. Although early models feature conservative lines and an understated profile, the real excitement lies in its powerful engine. The car produces 270 horsepower and 273 lb-ft of torque with its unique 4.0-liter W8 configuration.

Volvo V70R

The Volvo V70R presents a more subdued appearance, typical of Volvo’s focus on safety and functionality. It balances its lack of head-turning aesthetics with a 300-horsepower turbocharged five-cylinder engine. Its engineering includes advanced features like all-wheel drive and a sophisticated suspension system that enhances handling and stability.

Mercedes-Benz CL 600

Aesthetics is not one of the Mercedes-Benz CL 600’s strong selling points. The car’s main attraction is a 5.5-liter V12 engine delivering 510 horsepower. Combine this powerful performance with advanced engineering features, and you may never again be bothered by the vehicle’s looks.

Saab 9-2X Aero

The Saab 9-2X Aero’s beauty lies beneath its unassuming exterior. It comes in the form of a 230-horsepower turbocharged 2.5-liter flat-four engine that propels the car to 60 mph in 6.1 seconds. Its beauty also lies in its all-wheel-drive system and finely tuned suspension.