Porsche 718 Cayman GT4 RS vs 911 GT3: Track Performance Face-Off
The moment you fire up the 4.0-litre flat-six in either car, the 9,000 rpm redline tells you everything—these are the last of a dying breed.
TL;DR
The Porsche 718 Cayman GT4 RS and 911 GT3 share the same high-revving naturally aspirated engine, but they are fundamentally different machines. The GT4 RS is lighter, mid-engined, and arguably more playful. The GT3 has more power, wider tires, rear-axle steering, and superior aerodynamics. On a full-size track like the Nürburgring, the GT3 is faster. On shorter circuits, the gap nearly disappears—the GT4 RS actually beat the GT3 by a tenth of a second at Virginia International Raceway’s Lightning Lap.
Key Takeaways
- Both cars share the 4.0-litre naturally aspirated flat-six derived from Porsche’s motorsport program
- The GT4 RS produces 500 PS (493 hp) while the 911 GT3 makes 510 PS (502 hp) in the 992.1 generation
- The GT4 RS weighs 1,415 kg, roughly 20 kg less than the GT3’s lightest configuration
- The GT3 has rear-axle steering, a double-wishbone front axle, and significantly more downforce—key advantages on long tracks
- On shorter, tighter circuits, the GT4 RS’s lighter weight and mid-engine balance make it a near-equal match
The Shared Heart: Porsche’s Motorsport Flat-Six
The GT4 RS doesn’t just borrow the GT3’s engine—it inherits a motorsport legend.
Both cars use a 4.0-litre naturally aspirated flat-six that redlines at 9,000 rpm. This engine traces its lineage directly to the 911 GT3 R and 911 RSR race cars. It features individual throttle bodies for razor-sharp response, forged pistons, titanium connecting rods, and a dry-sump lubrication system proven in endurance racing.
In the GT4 RS, the engine is mounted directly behind the driver, with an airbox relocated into the cabin. That positioning, combined with intake ducts replacing the rear quarter windows, creates a soundtrack unlike anything else Porsche builds. The engine’s physical closeness to the driver makes the experience feel more intimate—almost like you’re sitting inside the engine itself.
The 911 GT3 gets a slightly more powerful tune: 510 PS and 470 Nm of torque versus the GT4 RS’s 500 PS and 450 Nm. The difference is marginal, and both cars hit 100 km/h in 3.4 seconds with PDK.
Chassis and Aerodynamics: Where They Diverge
Here’s where the two cars take fundamentally different paths.
The 911 GT3 benefits from decades of rear-engine development. The 992.1 generation introduced a double-wishbone front axle inspired by the 911 RSR race car, with tear-drop shaped trailing arms that increase downforce and improve brake cooling. Rear-axle steering rotates the rear wheels up to two degrees, enhancing both high-speed stability and low-speed maneuverability.
Porsche’s GT car chief Andreas Preuninger explained the advantage clearly: the GT3 “has rear-axle steering. This car [GT4 RS] doesn’t—it’s a mid-engine car, so it doesn’t need it, but it would surely make up a second or two or three”. The GT3 also features an electronic limited-slip differential, while packaging constraints forced the GT4 RS to use a mechanical unit.
Aerodynamics tell a similar story. The GT3 makes roughly 50% more downforce than its predecessor, with the Performance mode boosting rear downforce by 150% at 200 km/h. The GT4 RS produces about 25% more downforce than the standard GT4, with a swan-neck rear wing and optimized diffusers. The GT3’s aerodynamic advantage becomes more pronounced as speeds climb.
The GT4 RS compensates with its mid-engine layout. With the engine sitting between the axles, the Cayman achieves near-ideal weight distribution. Every chassis component connects via ball joints for precise, direct response. The result is a car that feels more agile, more willing to change direction, and—according to multiple reviewers—more fun.
Track Performance: What the Numbers Say
Nürburgring Nordschleife (20.832 km)
- 911 GT3 (992.1): 6:59.927
- 718 Cayman GT4 RS: 7:09.300
That’s a 9.4-second gap in favor of the GT3. But here’s where context matters. The GT3 achieved its time with rear-axle steering, wider tires, more downforce, and an electronic differential. The GT4 RS, working with a chassis architecture that dates back to 2011, got within 10 seconds of Porsche’s most focused track car.
Car and Driver’s Lightning Lap at Virginia International Raceway tells a different story. The GT4 RS lapped the 4.1-mile course in 2:40.5—a tenth of a second quicker than the GT3. The magazine noted that the GT4 RS “grips Turn 1 at 1.19 g’s, just under the GT3’s 1.22” but excels in the tight, technical sections where its lighter weight and mid-engine balance shine.
As Car and Driver concluded: “The debate on which Porsche GT car is better will not be decided today. Call them equals, for now”.
Comparison Table
| Specification | 718 Cayman GT4 RS | 911 GT3 (992.1) |
|---|---|---|
| Engine | 4.0L naturally aspirated flat-six | 4.0L naturally aspirated flat-six |
| Power | 500 PS (493 hp) | 510 PS (502 hp) |
| Torque | 450 Nm | 470 Nm |
| Weight (DIN) | 1,415 kg | ~1,435 kg (lightest config: 1,420 kg) |
| 0-100 km/h | 3.4 seconds (PDK) | 3.4 seconds (PDK) |
| Top Speed | 315 km/h | 311 km/h (PDK) |
| Nürburgring (20.832 km) | 7:09.300 | 6:59.927 |
| Front Suspension | MacPherson strut | Double-wishbone |
| Rear-Axle Steering | Not available | Standard |
| Differential | Mechanical limited-slip | Electronic limited-slip |
| Starting Price (US) | ~$143,000 | ~$170,000 |
Prices vary by market and options. The GT4 RS costs roughly $27,000 less than the GT3.
What the Experts Say
“The GT4 RS is the most track-focused mid-engine Porsche you can buy. In a call with media, Andreas Preuninger explained why the GT3 still beats the smaller GT4 around Germany’s most legendary track.” — Road & Track
Motor Sport Magazine’s Andrew Frankel put it differently: “If you couldn’t give tuppence for such stuff [lap times], the case for the GT3 is far harder to make. As a thing to drive, a machine in which to simply enjoy the business of being behind the wheel, the GT4 RS gives little or nothing away to its celebrity big brother”.
The GT4 RS is the more playful car. Frankel described it as a car that “wants to have fun”—one where you delight in the engine’s thrust and the close-ratio gearbox rather than chase lap records. The GT3, by contrast, is a serious track weapon that demands respect.
FAQ
Which is faster around the Nürburgring, the GT4 RS or 911 GT3?
The 911 GT3 is faster, lapping the Nordschleife in 6:59.927 versus the GT4 RS’s 7:09.300. The GT3’s aerodynamic and chassis advantages make the difference on long tracks.
Do the GT4 RS and GT3 share the same engine?
Yes, both use a 4.0-litre naturally aspirated flat-six derived from Porsche’s motorsport engines. The GT3 produces slightly more power (510 PS vs 500 PS).
Why is the GT4 RS slower than the GT3 on track?
The GT3 has rear-axle steering, a double-wishbone front axle, an electronic differential, wider tires, and more downforce. These advantages accumulate on longer circuits.
Which car is more fun to drive?
Many reviewers find the GT4 RS more engaging. Its mid-engine balance, lighter weight, and the engine’s proximity to the driver create a more intimate, playful experience.
Is the GT4 RS cheaper than the GT3?
Yes. The GT4 RS starts around $143,000 while the GT3 starts around $170,000 in the US market.
Can you get a manual transmission in either car?
The GT4 RS comes exclusively with PDK. The 911 GT3 offers a six-speed manual as an option.
The Verdict
The 911 GT3 is the faster car on a full-size race track. Its rear-axle steering, double-wishbone front suspension, electronic differential, and superior aerodynamics add up to a measurable advantage. Porsche’s engineers designed it to be the ultimate track-focused 911, and the Nürburgring time proves it.
The 718 Cayman GT4 RS is the more engaging car. It’s lighter, more agile, and more playful. The mid-engine layout puts the powerplant right behind your shoulders, and the intake noise fills the cabin in a way the GT3 never will. On shorter tracks, it can match or beat its bigger brother.
If lap times are everything, buy the GT3. If driving pleasure is the priority—and you don’t need the biggest wing or the longest spec sheet—the GT4 RS delivers more smiles per mile. And with a $27,000 price advantage, it’s arguably the smarter buy for anyone who drives for joy rather than stopwatch validation.
Always drive responsibly on public roads. These are track-focused machines—save the limit-finding for closed circuits.
Which would you choose: the precision of the 911 GT3 or the playfulness of the 718 Cayman GT4 RS? Share your thoughts in the comments.
References:
- Car and Driver – 2023 Porsche 718 Cayman GT4 RS at Lightning Lap 2023
- Road & Track – Why the Porsche 718 Cayman GT4 RS Still Can’t Beat the 911 GT3 Around the Nurburgring
- Porsche Media Kit – 全新 911 GT3
- Motor Sport Magazine – 2022 Porsche Cayman GT4 RS Review: It’s Playtime
- Porsche Media Kit – 全新保时捷 718 Cayman GT4 RS
