2021 BMW M3 Competition vs 2021 Porsche 718 Cayman GT4 RS

AI Telemetry Verdict:In this head-to-head, the 2021 Porsche 718 Cayman GT4 RSholds the statistical edge in Performance Index (798). For the technical touge passes of Mount Fuji, the 2021 Porsche 718 Cayman GT4 RSis the superior technical chassis due to its refined lateral G-force profile.

Live Telemetry Analysis — May 2026 Edition
2021 BMW M3 Competition
A 785

2021 BMW M3 Competition

BMW
VS
2021 Porsche 718 Cayman GT4 RS
A 798

2021 Porsche 718 Cayman GT4 RS

Porsche
Top Performer
2021 Porsche 718 Cayman GT4 RS

"Analyzing the raw telemetry, the 2021 Porsche 718 Cayman GT4 RS proves to be the more capable machine in all-around festival racing, outclassing the 2021 BMW M3 Competition."

2021 BMW M3 CompetitionMetric2021 Porsche 718 Cayman GT4 RS
785Performance Index798
7.6Speed7.5
7.4Handling8
7.2Acceleration7.4
7.5Launch7.7
7.8Braking8.1
3.5Offroad2.8
180Top Speed (MPH)196
3890Weight (lbs)3120
RWDDrivetrainRWD
90,000Price (CR)140,000
🚦
Drag Race
2021 Porsche 718 Cayman GT4 RS
🏎️
Track Attack
2021 Porsche 718 Cayman GT4 RS
💨
Drift Zone
2021 BMW M3 Competition
🏜️
Offroad King
2021 BMW M3 Competition

📈 Technical Data Analysis:

Speed & Acceleration Analysis

When it comes to straight-line performance, the 2021 BMW M3 Competition boasts a speed rating of 7.6, while the 2021 Porsche 718 Cayman GT4 RS hits 7.5.

The 2021 BMW M3 Competition has the edge in top-end velocity, reaching 180 MPH compared to the 2021 Porsche 718 Cayman GT4 RS's 196 MPH.

Handling & Cornering Dynamics

In the tight technical sections of the Mount Fuji passes, handling is everything. The 2021 BMW M3 Competition features a handling score of 7.4, whereas the 2021 Porsche 718 Cayman GT4 RS manages 8.

The 2021 Porsche 718 Cayman GT4 RS maintains superior stability through high-speed sweepers, minimizing the risk of traction loss.

Launch & Braking Efficiency

Off the line, the 2021 BMW M3 Competition uses its 7.5 launch rating to grip and go, while the 2021 Porsche 718 Cayman GT4 RS relies on its 7.7 rating.

Braking from high speeds is equally critical; the 2021 BMW M3 Competition stops with a score of 7.8, while the 2021 Porsche 718 Cayman GT4 RS records 8.1.

🏁 Race Scenario Breakdown

Highway Sprint (Tokyo Loop)
2021 BMW M3 Competition

Higher top speed rating allows for sustained high-velocity overtaking.

Touge Battle (Downhill)
2021 Porsche 718 Cayman GT4 RS

Superior braking and handling allow for more aggressive entry and exit speeds.

Dirt Trails (Kyoto)
2021 BMW M3 Competition

Suspension travel and tire compound optimization for loose surfaces.