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2024 Mercedes-AMG SL-class vs BMW Z4: Which is Better?
The Mercedes-AMG SL-class seamlessly blends luxury and performance in a striking convertible design, prioritizing performance while retaining a touch of luxury for its traditional customer base. The latest model introduces a two-plus-two configuration with rear seats more suitable for storage than passengers. The glamorous interior showcases a customizable central touchscreen, and the power soft top slightly reduces trunk space. Three powertrains are available, spanning from a turbocharged four-cylinder to a potent V8. In contrast, the BMW Z4, serving as a convertible companion to the Toyota Supra, shares a platform but brings its distinctive character. With a choice of a 255-hp inline-four or a 382-hp inline-six, both RWD, the Z4 features BMW’s turbocharged engines. The optional six-speed manual enhances driver engagement, complementing the sporty driving demeanour, while the upscale cabin, comfortable ride, and surprisingly spacious trunk add versatility for both spirited drives and everyday use.
| Mercedes-AMG SL-class | BMW Z4 | |
| Dimensions | 185.2 in x 75.4 in x 53.5 in | 170.7 in x 73.4 in x 51.4 in |
| Engine | 4.0L twin-turbocharged V8 | 3.0L turbocharged inline-6 |
| Horsepower | 577 hp | 375 hp |
| Torque | 590 lb-ft | 354 lb-ft |
| 0-60 MPH | 3.0 sec | 3.5 sec |
| 0-100 MPH | 7.1 sec | 8.8 sec |
| Top-Speed | 196 mph | 152 mph |
Mercedes-AMG SL-class
Engine & Performance
Except for the entry-level SL43, featuring a 375-hp turbocharged 2.0L inline-four, the SL models derive power from a twin-turbo 4.0L V8 sourced from the GT sports car. The SL55 boasts a robust 469 hp while upgrading to the SL63 elevates that figure to an impressive 577 hp. Solely equipped with a nine-speed automatic transmission, the SL55 and SL63 feature standard AWD and four-wheel steering, whereas the SL43 is exclusive RWD. At the peak of power, the SL63 S E Performance takes centre stage as a plug-in hybrid, coupled with a twin-turbo V8 with an electric motor for an astonishing 805 hp.
Price & Mileage
The anticipated starting price for the Mercedes-AMG SL-Class is approximately $111,000 for the SL43, escalating to $200,000 for the SL63 S E Performance. All SL models boast an array of standard luxury features, encompassing massaging seats, a head-up display, and a Burmester stereo system. Opting for the pricier SL63 unleashes the full potential of the twin-turbo V8. Fuel efficiency estimates reveal the SL55 at 14 mpg city and 22 mpg highway, with the more potent SL63 slightly lower at 13 mpg city and 21 mpg highway. The SL43 offers notably better estimates at 21 mpg city and 27 mpg highway.
Acceleration & Features
During testing, the SL63 impressively accelerated to 60 mph in a mere 3.0 seconds, accompanied by a distinctive exhaust note. Although the SL55 hasn’t undergone testing, the base SL43 demonstrated a respectable 0-60 mph time of 4.5 seconds on the track. According to AMG, the high-powered SL63 S E Performance, boasting 805 hp, can achieve the 0-60 mph sprint in as little as 2.8 seconds. All SL models feature Mercedes’s latest MBUX infotainment system, including the “Hey Mercedes” virtual assistant and an expansive 11.9-inch touchscreen display. Standard equipment includes a 12.3-inch digital gauge display, Apple CarPlay, Android Auto, and a navigation system with available augmented reality. The SL lineup is equipped with a Burmester stereo system, with the SL63 offering an optional upgraded surround-sound version.
BMW Z4
Engine & Performance
In terms of gear control, every Z4 features an eight-speed automatic transmission with sport and manual modes, and you get standard paddle shifters on the steering wheel. While a classic manual option is not on the table for the BMW Z4, the eight-speed automatic stands out for its sharp responses, quick shifts, and smooth operation. The sDrive30i is driven by BMW’s impressive turbocharged 2.0L four-cylinder, delivering ample torque and strength beyond its 255 hp.
Price & Mileage
Starting at $54,595, the Z4 sDrive30i proves a great deal compared to its main competitor, the Porsche 718 Boxster. With ample performance for most buyers, this BMW model comes at a considerably lower cost. Despite its robust performance, the Z4 stands out as one of the most fuel-efficient sports cars in its class, boasting an EPA-rated fuel economy of 25 mpg city and 32 mpg highway. This makes it an economical choice without compromising on power.
Acceleration & Features
Testing the Z4 shows it hits 60 mph in 5.1 seconds, which is lively but a tad behind the 718 Boxster. Standard features include a generous 10.3-inch touchscreen, navigation, and free Apple CarPlay integration; unfortunately, no Android Auto. BMW’s latest iDrive system is user-friendly, boasting sharp graphics and easy control through the console’s knob, buttons, or voice commands. The Z4 comes with standard USB and Bluetooth streaming, but SiriusXM radio incurs an additional cost.