2018 Porsche Cayenne III Dimensions, Size & Specs

The Porsche Cayenne III has a curb weight ranging between 1985 kg and 2490 kg (4380 to 5490 lbs), which can vary based on the specific model, equipment, and drivetrain options installed. The maximum permissible weight (gross vehicle weight rating) lies between 2830 kg and 3075 kg (6240 to 6780 lbs). This weight range reflects the Cayenne's sturdy build characteristic of luxury SUVs, balancing both performance and structural strength to support features like advanced safety equipment, all-wheel drive systems, and various powertrain configurations.

The Porsche Cayenne III offers flexible cargo space to accommodate different needs. With the rear seats upright, the luggage capacity ranges from 645 liters to 772 liters (22.8 to 27.3 cubic feet). Folding down the rear seats significantly expands this capacity to between 1605 liters and 1710 liters (56.7 to 60.4 cubic feet), providing generous space for larger items, sports equipment, or luggage. This versatility makes the Cayenne III suitable for both daily use and longer trips requiring substantial cargo room.

The Porsche Cayenne III is equipped with an adjustable air suspension system that provides a ride height (ground clearance) ranging from 190 mm to 210 mm (7.5 to 8.3 inches). This adjustable suspension allows the driver to raise or lower the vehicle depending on driving conditions, such as off-road terrain or highway cruising. The standard clearance provides adequate capability for urban and mild off-road use, while the enhanced ride height options enhance versatility without compromising the sporty driving dynamics Porsche is known for.

The Porsche Cayenne III comes with a variety of tire and rim size options tailored for both performance and aesthetics. Rim sizes include 9.5J x 19, 8.5J x 19, 11J x 21, 9.5J x 21, and 8.5J x 21 inches. Corresponding tire sizes range from 275/50 R19, 255/55 R19, 315/35 R21, 285/40 R21, to 315/35 ZR21, and 285/40 ZR21. These options allow owners to customize their vehicle for different driving preferences—whether emphasizing comfort, sporty handling, or a bold appearance.

The Porsche Cayenne III’s width ranges from 1983 mm (78.1 inches) without mirrors to 2194 mm (86.3 inches) with mirrors open, and the length is about 4918 to 4929 mm (193.5 to 194 inches). Standard residential garage dimensions usually measure around 2440 mm (96 inches) wide and 6100 mm (240 inches) deep, which means the Cayenne III will fit lengthwise with space to spare. Width-wise, when the side mirrors are folded in, the vehicle can fit comfortably in most standard two-car garages; however, with mirrors extended, extra caution is needed as it approaches the typical garage width limits. Overall, the Porsche Cayenne III can fit in a standard residential garage if mirrors are folded.

Compared to the Porsche Cayenne II (produced from 2010 to 2017), the Cayenne III offers a slightly larger and more refined footprint. The third generation’s length increased marginally to approximately 4918-4929 mm (+60 to 100 mm), compared to the roughly 4808-4849 mm length range of the Cayenne II. Width is fairly consistent, though the Cayenne III’s mirrors opened width of 2194 mm is wider due to updated mirror designs. Height is slightly higher by 10 to 20 mm, and the curb weight increased due to added luxury features and advanced technologies, ranging up to 2490 kg versus around 2200 to 2300 kg in the previous generation. Overall, the Cayenne III is larger and heavier but benefits from improved interior space, technology, and styling advancements.

The Porsche Cayenne III competes in the large luxury SUV segment alongside vehicles such as the BMW X5, Mercedes-Benz GLE, Audi Q7, and Range Rover Sport. Dimensionally, the Cayenne’s length of roughly 4.92 meters (193.5 inches) is competitive, slightly shorter than the typical Q7 which ranges closer to 5 meters (197 inches), but similar to or marginally larger than the BMW X5 and Mercedes GLE which fall between 4.9 and 5 meters in length. Its width of nearly 2 meters (78.1 inches) and height around 1.67 to 1.7 meters (65.9 to 66.7 inches) place it squarely in the segment average. The Cayenne emphasizes a sportier, lower profile compared to more traditionally boxy SUVs, offering a blend of luxury, space, and Porsche's signature driving dynamics.

The roof load capacity of the Porsche Cayenne III is 100 kg (220 lbs). This figure represents the maximum weight permissible on the roof rack or roof rails without compromising the vehicle’s structural integrity or safety. It is critical for users planning to carry additional cargo such as roof boxes, sports equipment (bikes, skis, kayaks), or luggage on roof-mounted carriers. Exceeding this limit may affect driving stability, fuel efficiency, and could potentially damage the roof structure or suspension system.

The Porsche Cayenne III, produced from 2017 to 2023, is classified as a luxury mid-size SUV offered in several variants including petrol, diesel (depending on market), hybrid, and high-performance models such as the Cayenne Turbo. It blends Porsche’s renowned sports car performance with SUV practicality, offering advanced driving dynamics, off-road capabilities, and refined luxury interiors. Its distinguishing features include state-of-the-art technology, adaptive suspension systems, and sumptuous materials. This generation also introduced mild-hybrid technology in certain trims for improved efficiency without sacrificing luxury or power.