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BMW 8 Series Convertible VS Porsche Cayman – Specs, Efficiency & Price Comparison

Which model is the better choice – the BMW 8 Series Convertible or the Porsche Cayman? We compare performance (625 HP vs 500 HP), boot capacity (350 L vs 184 L), efficiency (6.90 L vs 13 L), and of course, the price (99400 £ vs 136000 £).
Find out now which car fits your needs better!

The BMW 8 Series Convertible (Convertible) is powered by a Diesel MHEV or Petrol engine and comes with a Automatic transmission. In comparison, the Porsche Cayman (Coupe) features a Petrol engine and a Automatic gearbox.

When it comes to boot capacity, the BMW 8 Series Convertible offers 350 L, while the Porsche Cayman provides 184 L – depending on what matters most to you. If you’re looking for more power, you’ll need to decide whether the 625 HP of the BMW 8 Series Convertible or the 500 HP of the Porsche Cayman suits your needs better.

There are also differences in efficiency: 6.90 L vs 13 L. In terms of price, the BMW 8 Series Convertible starts at 99400 £, while the Porsche Cayman is available from 136000 £.

Compare all the key specs now and find out which model fits your lifestyle best!

BMW 8 Series Convertible

The BMW 8 Series Convertible epitomises luxury driving with its elegant design and open-top experience. Its impressive performance capabilities are matched by a meticulously crafted interior, offering both comfort and advanced technology features. This convertible blends sports car dynamics with sophisticated refinement, making it a standout choice for those seeking style and exhilaration.

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Porsche Cayman

The Porsche Cayman stands out as a quintessential sports car, blending sleek design with dynamic handling. Its mid-engine layout provides an excellent balance and sharp agility that driving enthusiasts crave. Inside, the Cayman offers a refined and driver-focused interior, ensuring that every journey is an exhilarating experience.

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BMW 8 Series Convertible
Porsche Cayman
8 Series Convertible

Costs and Consumption

Price
99400 - 165800 £
Price
136000 £
Consumption L/100km
6.9 - 11.2 L
Consumption L/100km
13 L
Consumption kWh/100km
-
Consumption kWh/100km
-
Electric Range
-
Electric Range
-
Battery Capacity
-
Battery Capacity
-
co2
180 - 255 g/km
co2
295 g/km
Fuel tank capacity
66 - 68 L
Fuel tank capacity
54 L

Dimensions and Body

Body Type
Convertible
Body Type
Coupe
Seats
4
Seats
2
Doors
2
Doors
2
Curb weight
1915 - 2125 kg
Curb weight
1490 kg
Trunk capacity
350 L
Trunk capacity
184 L
Length
4851 - 4867 mm
Length
4456 mm
Width
1902 - 1907 mm
Width
1822 mm
Height
1345 - 1353 mm
Height
1267 mm
Payload
340 - 425 kg
Payload
281 kg

Engine and Performance

Engine Type
Diesel MHEV, Petrol
Engine Type
Petrol
Transmission
Automatic
Transmission
Automatic
Transmission Detail
Automatikgetriebe
Transmission Detail
Automat. Schaltgetriebe (Doppelkupplung)
Drive Type
All-Wheel Drive, Rear-Wheel Drive
Drive Type
Rear-Wheel Drive
Power HP
333 - 625 HP
Power HP
500 HP
Acceleration 0-100km/h
3.3 - 5.5 s
Acceleration 0-100km/h
3.40 s
Max Speed
250 km/h
Max Speed
315 km/h
Torque
500 - 750 Nm
Torque
450 Nm
Number of Cylinders
6 - 8
Number of Cylinders
6
Power kW
245 - 460 kW
Power kW
368 kW
Engine capacity
2993 - 4395 cm3
Engine capacity
3996 cm3

General

Model Year
2024
Model Year
2021
CO2 Efficiency Class
G
CO2 Efficiency Class
G
Brand
BMW
Brand
Porsche

BMW 8 Series Convertible

The Epitome of Open-Top Luxury: The BMW 8 Series Convertible

The BMW 8 Series Convertible is a true testament to the fusion of luxury, performance, and cutting-edge technology. This elegant vehicle offers an unparalleled driving experience, blending thrilling dynamics with open-top freedom. Let's delve into the technical details and innovative features that make the BMW 8 Series Convertible a standout in its class.

Powertrains and Performance

At the heart of the BMW 8 Series Convertible are its powerful engine options, catering to both diesel and petrol enthusiasts. Engine outputs range from a robust 333 PS in the 840i models to a staggering 625 PS in the M8 Competition variant. With a state-of-the-art automatic transmission as standard and options for both rear-wheel and all-wheel drive, the vehicle ensures smooth, responsive handling across its range.

These impressive powertrains result in remarkable acceleration, with 0-100 km/h times as low as 3.3 seconds. The maximum speed is electronically limited to 250 km/h, ensuring not just speed but also safety and control. The combination of performance and efficiency is notable, with fuel consumption ranging from 6.9 to 11.5 litres per 100 km, depending on the model.

Advanced Engineering and Innovation

The BMW 8 Series Convertible is built on the brand's commitment to innovation. It features a Mild-Hybrid technology in its diesel variants, which enhances efficiency and performance by integrating a 48-volt starter generator. This smart enhancement reduces fuel consumption and CO2 emissions while providing an extra burst of power.

Another innovative advancement is the use of lightweight materials, such as aluminium and carbon fibre, which help to decrease the vehicle's weight, contributing to better agility and lower emissions. The dynamic adaptive suspension provides an optimised comfort and handling balance, tailored to personal preference and driving conditions.

Exquisite Design and Luxury Features

The design of the BMW 8 Series Convertible is both captivating and purposeful. Its length spans over 4,850 mm, with a wide stance that communicates its performance capabilities. Despite its sporty nature, it doesn’t compromise on luxury, featuring a thoughtfully designed interior with high-quality materials and cutting-edge connectivity.

Technological highlights include the BMW Live Cockpit Professional with a high-resolution display, voice control, and extensive connectivity features to keep you informed and entertained. Additionally, premium audio systems provide a concert-like experience, while active driver assistance technologies enhance safety and convenience on the road.

The Perfect Blend of Style and Substance

With its panoramic open-top experience, the BMW 8 Series Convertible offers not just a driving experience, but a lifestyle statement. Accommodating four passengers comfortably, the vehicle provides a good balance of space and sportiness, making it an ideal choice for those seeking luxury without compromising practicality.

The BMW 8 Series Convertible is not just about getting from A to B; it's about enjoying the journey with every drive. Its elegant design, potent performance, and innovative technologies make it one of the most desirable vehicles in its segment. Whether carving through corners or cruising open roads, this convertible embodies the spirit of BMW's “Sheer Driving Pleasure.”

Porsche Cayman

The Porsche Cayman: A Masterclass in Precision Engineering

For decades, Porsche has been synonymous with precision, power, and unparalleled driving experience. The Porsche Cayman, particularly the newest iteration like the 718 Cayman GT4 RS, continues this legacy with a suite of cutting-edge technical features and exhilarating performance capabilities. Nestled in the sports car segment, this coupe has been engineered to provide an almost symbiotic relationship between car and driver.

Performance that Blazes a New Trail

The heart of the Cayman GT4 RS is a robust 4.0-liter naturally aspirated flat-six engine, pushing out an astounding 500 horsepower. This engine provides a visceral connection to the road, combined with a curiously addictive exhaust note that Porsche enthusiasts have come to love. With 450 Nm of torque, the acceleration feels unyielding, propelling the car from 0 to 100 km/h in a mere 3.4 seconds. Coupled with a PDK dual-clutch automatic transmission, each gear change feels precise and instantaneous, making it an exhilarating drive on both road and track.

Innovative Design Meets Functionality

The Porsche Cayman has always showcased a balance of aesthetic elegance and aerodynamic functionality. With a length of 4456 mm, width of 1822 mm, and a height of 1267 mm, the dimensions are tightly packed for optimal stability and agility. The coupe's 1490 kg curb weight contributes to its nimbleness, while the rear-wheel-drive configuration ensures a pure sports-car feel.

Efficiency Coupled with Performance

While performance is at the core of the Porsche ethos, efficiency hasn't been compromised. The Cayman GT4 RS has a fuel consumption rate of 13 L/100 km, striking an impressive balance between power and sustainability, although it maintains a CO2 efficiency class of G, indicative of its performance-oriented design.

Details that Make a Difference

Inside the cabin, the Cayman is fitted to perfection with a focus on the driver-centric experience. Despite its sporty DNA, it doesn't skimp on comfort—there's ample seating for two alongside a sizable trunk capacity of 184 liters, enhancing its practicality for weekend getaways.

Additionally, the car boasts a CO2 emission of 295 g/km and supports a payload of 281 kg, underscoring its utility without detracting from its core focus on high performance.

The Ultimate Driving Machine?

With a top speed of 315 km/h, the Cayman GT4 RS lives up to its billing as a track-bred sports car. The precision engineering, combined with innovative technological integrations, sets it apart from contemporaries in its class. While the sleek exterior exudes luxury, it's the engineering beneath that makes the Cayman an acme of what a modern sports coupe can achieve.

In the Porsche Cayman, enthusiasts meet a machine so finely tuned and so divinely balanced that it stands as a testament to the relentless pursuit of perfection—a masterpiece of modern automotive engineering.

The prices and data displayed are estimates based on German list prices and may vary by country. This information is not legally binding.