Porsche 991 GT3 Buying Guide

The Porsche 911 GT3 has always been the epitome of driving precision and performance. The 991-generation GT3, produced between 2013 and 2019, offers a blend of thrilling capabilities and everyday usability. If you’re considering buying a used Porsche 911 991 GT3, it’s essential to understand the differences between the two main models: the 3.8-litre (produced from 2013 to 2016) and the more powerful 4.0-litre (produced from 2017 onwards). This guide will provide insight into engine configurations, specifications, and the optional extras that can impact your buying decision.

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Engine Configuration and Performance

Porsche 911 GT3 3.8 (2013-2016)

The 3.8-litre engine in the 991 GT3 is a naturally aspirated, six-cylinder flat-six unit, producing 475 horsepower at 8,250 rpm and 440 Nm of torque at 6,250 rpm. The engine is paired exclusively with a 7-speed dual-clutch PDK transmission, which ensures rapid gear shifts and an engaging driving experience. The 3.8 GT3 accelerates from 0 to 60 mph in just 3.5 seconds, with a top speed of around 195 mph.

The 3.8-litre GT3 is renowned for its sharp handling, direct steering, and exceptional braking performance. It features rear-wheel drive and an active rear axle that provides additional stability and responsiveness when cornering.

Porsche 911 GT3 4.0 (2017-2019)

The 4.0-litre engine found in the later 991 GT3 models is a significant step up in terms of performance. With a larger displacement, this engine produces 500 horsepower at 8,250 rpm and 470 Nm of torque at 6,250 rpm. The increased power allows the 4.0 to accelerate from 0 to 60 mph in just 3.2 seconds, and it can reach a top speed of around 197 mph.

One of the key differences between the 3.8 and 4.0 models is the change in engine configuration. The 4.0-litre engine is derived from the 911 GT3 RS, which brings with it additional engineering refinements. This includes a revised intake and exhaust system, along with optimised cooling, all of which improve the car’s overall responsiveness. Like the 3.8, the 4.0 also uses the PDK transmission and rear-wheel drive, but the 4.0 offers even more thrilling performance, especially at higher revs.

Specifications and Differences

Both the 3.8 and 4.0 models share many core features, including the iconic Pirelli P-Zero tyres, an active suspension management system, and a comprehensive set of driver aids. However, there are several key differences in terms of features and performance:

• Suspension: The 3.8 uses a fixed suspension setup that is sporty but also practical for everyday use. The 4.0, on the other hand, has an upgraded suspension system with a wider track and revised geometry, offering enhanced cornering and stability at higher speeds.
• Exhaust System: The 4.0 comes with an improved exhaust system that delivers a more aggressive, louder soundtrack, an aspect that many enthusiasts value.
• Braking: Both models offer Porsche’s Carbon Ceramic Brakes (PCCB) as an optional extra, but the 4.0 benefits from slightly larger discs that are more resistant to fade, especially during track use. No PCCBs but fancy better brakes? Check them out here!
• Weight: While both models are lightweight, the 4.0 is marginally lighter, thanks to additional use of carbon fibre and other lightweight materials.

Trim Levels and Optional Extras

When buying a used 991 GT3, it's important to consider the optional extras and trim levels that could affect the driving experience and resale value. Both the 3.8 and 4.0 models are well-equipped as standard, but there are several desirable options that can be worth looking out for.

• Porsche Ceramic Composite Brakes (PCCB): As mentioned, these carbon ceramic brakes are available as an option and are highly recommended for those who plan to track the car. Not only do they offer superior performance, but they also reduce the car’s weight.
• Sports Chrono Package: This package enhances performance features, including a launch control function, dynamic transmission mounts, and a sportier exhaust system. It’s an essential option for those seeking the ultimate driving experience.
• Bucket Seats: The optional carbon fibre bucket seats provide excellent support during spirited driving and track days. They’re lightweight and more aggressive than the standard sport seats, but they may not be as comfortable for everyday use.
• Front Axle Lift System: Available on both the 3.8 and 4.0, this option raises the front of the car, making it easier to navigate speed bumps or steep driveways without scraping the front splitter. It’s a practical addition for owners who use their GT3 as a daily driver.
• Colour and Interior Customisation: Porsche offers a range of colour and interior options for the 991 GT3. The more striking colours, such as Guards Red, Miami Blue, or Racing Yellow, are often more desirable on the second-hand market, while interior options like leather or Alcantara can enhance the cabin's overall look and feel.
• Sports Exhaust System: For those who want to amplify the car's exhaust note, the sports exhaust system is an option worth considering. This provides a more aggressive sound and is especially appealing to enthusiasts.

Things to Look Out For When Buying a Used 991 GT3

When buying a used 991 GT3, it’s important to check the condition of the car’s key components. Make sure to review the service history, ensuring that the car has been well-maintained and serviced by authorised Porsche dealerships. The 991 GT3 is renowned for its reliability, but the high-performance nature of the vehicle means that it should be treated with care.

Check for signs of wear and tear, especially on the suspension, brakes, and tyres, as these can wear out more quickly in a performance car. Additionally, ensure that any optional extras and upgrades are fully functional, such as the front axle lift system, the sports exhaust, or any modifications made to the vehicle.

Conclusion

The Porsche 911 991 GT3 3.8 and 4.0 are exceptional cars that offer superb performance and an unmatched driving experience. While the 3.8 offers plenty of thrills, the 4.0’s additional power and refined features make it the more desirable choice for many buyers. Whichever model you choose, ensuring that the car is well-maintained and equipped with the right options will go a long way in enhancing your ownership experience.