Porsche Cayenne vs Mercedes-Benz GLA

The 2021 Mercedes-Benz GLA presented a modernized look with its new generation, fitting snugly as the smallest SUV in the Mercedes lineup. Its proportions and styling clearly defined its position below the GLS, GLE, GLC, and GLB. As an entry-level model, the GLA was larger than most subcompact SUVs, comparable in size to the BMW X1. The new GLA was three inches taller and slightly shorter in length than its predecessor, featuring short overhangs and cladding that enhanced its muscular appearance. Despite the small-looking windows, the seating positions provided ample visibility. Standard LED headlights and optional adaptive LED headlights were available. Inside, the GLA 250's interior was filled with less-than-premium surfaces, though the seats were well-appointed. However, the overall interior quality did not measure up to other luxury crossovers, with mass-market models offering nicer interiors for a similar price.

The 2025 Porsche Cayenne offered a choice between a standard SUV with a squared-off rear or a sporty Cayenne Coupe. The GTS trim level featured high gloss black trim and bronze exhaust tips, with a unique front fascia and larger air intakes. Red brake calipers and 21-inch wheels added to its sporty look. Inside, the Cayenne allowed for extensive customization, from color to trim to seat belts. The options list was vast, with features like custom paint jobs and adaptive rear spoilers. The cabin was well-organized, with mechanical controls for important features and a shifter toggle on the dashboard for more storage space. The Cayenne GTS struck a balance between sporty performance and daily driving comfort, with options to enhance the driving experience even on the base model.

The 2021 Mercedes-Benz GLA was available in three variants, with a fourth on the way. The GLA 250 and GLA 250 4MATIC were powered by a 2.0-liter turbocharged four-cylinder engine, delivering 221 horsepower and 258 pound-feet of torque. The AMG GLA 35 offered 302 hp and 295 lb-ft of torque, while the AMG GLA 45 upped the power to 382 hp and 354 lb-ft of torque. The GLA 250 had a zero to 60 mph time of 6.8 seconds, while the AMG GLA 35 and AMG GLA 45 achieved 5.1 and 4.3 seconds, respectively. The GLA's AWD system could be regulated using drive modes, with different torque distribution ratios for Eco/Comfort, Sport, and Off-Road modes. The GLA 250 struggled with turbo lag and low-end gearing confusion, but performed better at highway speeds. Its ride quality was good, but road noise was significant, and the steering was numb.

The 2025 Porsche Cayenne offered a range of engines, with the base 3.0-liter V6 producing 348 horsepower and 368 pound-feet of torque. The Cayenne S featured a V8 with 468 hp, while the Turbo GT offered 650 hp. Plug-in hybrid options provided up to 729 hp. The Cayenne GTS, with a twin-turbo 4.0-liter V8, delivered 493 hp and 486 lb-ft of torque. It could reach 60 mph in 4.2 seconds, with a top speed of 171 mph. The GTS trim offered precise steering, a low center of gravity, and an agile driving experience. Sport and Sport Plus modes enhanced throttle and transmission performance, while Normal mode provided a comfortable commute. The Cayenne GTS offered a sporty SUV experience without sacrificing daily driving comfort, with options to enhance the driving experience even on the base model.

The 2021 Mercedes-Benz GLA's added height provided a more SUV-like seating position, with easy ingress and egress. Front passengers enjoyed fantastic headroom and legroom, while the rear seats offered more legroom than before. The five-seat GLA came standard with synthetic leather upholstery, power-adjustable front seats, and reclining rear seats. Cargo space was average for its class, with 15.4 cubic feet behind the rear seats and 50.5 cubic feet with the seats folded. The low, nearly flat load floor and available power liftgate made loading cargo easy.

The 2025 Porsche Cayenne offered a range of customizable interior options, with standard eight-way power-adjustable seats and two-zone climate control. Higher trims added features like a GT Sport steering wheel and Race-Tex headliner. The options list was extensive, allowing for customization of nearly every aspect of the interior. The Cayenne accommodated five people, with a comfortable second row and ample headroom. The standard Cayenne offered 27.3 cubic feet of cargo space, expanding to over 60 cubic feet with the rear seats folded. The coupe version had slightly less space, while plug-in hybrid models had reduced cargo capacity.

The 2021 Mercedes-Benz GLA featured the Mercedes-Benz User Experience (MBUX) infotainment system, with two 7.0-inch display screens. The system included four USB ports, Bluetooth, Apple CarPlay, and Android Auto. Upgrades included a 10.25-inch touchscreen, 12-speaker Burmester audio system, wireless charging, WiFi hotspot, head-up display, and navigation. The MBUX system was easy to use, with intuitive scrolling and selection functionality. However, it lacked a quick way to scroll through radio stations. Voice-activated controls responded quickly to commands, and the GLA introduced a car-wash function for convenience.

The 2025 Porsche Cayenne boasted a curved 12.6-inch digital gauge cluster and a 12.3-inch touchscreen display running the Porsche Communication Management system. It included wireless Apple CarPlay, Android Auto, Spotify, Apple Music, satellite radio, and a Wi-Fi hotspot. An optional 10.9-inch passenger screen allowed for navigation and media control. The screens were well-organized and responsive, with voice control options. A head-up display provided pertinent information, though it appeared dim with polarized sunglasses. The system included night-vision assist and four high-speed USB-C charging ports, along with a cooled wireless charging area.

The 2021 Mercedes-Benz GLA came with a reasonable amount of active safety features, including a rearview camera, blind-spot monitoring, forward-collision warning, vehicle-exit warning, automatic emergency braking, driver-drowsiness monitoring, and crosswind assist. The Driver Assistance Package added features like adaptive cruise control, active lane change assist, and evasive steering assist. The Parking Assistance Package included a surround-view camera system and parking assist technology. Without the Driver Assistance Package, the GLA's safety features felt lacking compared to less expensive SUVs.

The 2025 Porsche Cayenne offered standard parking sensors, forward collision warning, and blind-spot monitoring, but adaptive cruise control, lane-keeping assist, and lane-departure warning were optional. Porsche's InnoDrive adaptive cruise control system was advanced but not tested. Neither the NHTSA nor the IIHS had rated the 2025 Cayenne for safety.