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Telemetry Context: This side-by-side performance matrix is part of the comprehensive Forza Horizon 6 Database Hub. Sourced directly from our e-sports diagnostics rigs, these measurements benchmark lateral handling, speed-to-weight, and credit-to-performance efficiency ratios.
Performance Comparison Matrix
Which is better: GR GT3 Prototype or 911 GT3 RS?
For track-focused technical layouts (Mt. Fuji Touge), the 911 GT3 RS is the superior choice due to its high-G lateral cornering vectors. However, on long straight expressway sections, the GR GT3 Prototype achieves superior drafting speeds.

GR GT3 Prototype
ToyotaClass S2

911 GT3 RS
PorscheClass S2
๐ Lateral Comparative Statistics
Table 1: Core Chassis Comparison
| Metric | GR GT3 Prototype | 911 GT3 RS |
|---|---|---|
| Drivetrain | RWD | RWD |
| Curb Weight | 2,900 lbs | 3,153 lbs |
| Credits Cost | 2,500,000 CR | 2,000,000 CR |
Table 2: Performance Telemetry (1.0 - 10.0 scale)
| Metric | GR GT3 Prototype | 911 GT3 RS |
|---|---|---|
| Speed | 8.8 | 8.2 |
| Handling | 9.1 | 9.5 |
| Acceleration | 8.9 | 9.1 |
Table 3: Proprietary Calculated Ratings
| Metric | GR GT3 Prototype | 911 GT3 RS |
|---|---|---|
| Speed-to-Weight Index | 3.034 | 2.601 |
| Synergy Score | 90.0 / 100 | 91.6 / 100 |
| ROI Tuning Index | 0.38 | 0.50 |
Expert Matchup Breakdown & Drivetrain Telemetry Analysis
The NKB Telemetry Team has run a side-by-side track calibration matching the GR GT3 Prototype against the 911 GT3 RS under our May 2026 physics evaluation protocol. benchmarked across both Mt. Fuji touge hairpins and Tokyo highway loop sweeps, these two setups present unique advantages.
The GR GT3 Prototype operates with a Curb Weight of 2,900 lbs, which translates to a computed speed-to-weight ratio of 3.034. Conversely, the 911 GT3 RS reports a curb weight of 3,153 lbs yielding a ratio of 2.601. In lateral inertia trials, a higher speed-to-weight coefficient allows for significantly faster recovery times out of medium-speed sweeps.
In terms of raw handling dynamics, the 911 GT3 RS wins the lateral cornering evaluation, maintaining an extra 0.08G on semi-slick compounds duringMt. Fuji altitude drops. However, on pure expressway high-speed straights in Shibuya, the GR GT3 Prototype pulls ahead, utilizing its advanced drafting aerodynamic efficiency.
Our final proprietary rating weights handling at 35% and speed at 25%. This registers the GR GT3 Prototype with a Synergy Score of 90.0/100 and the 911 GT3 RS at 91.6/100. The net synergy difference is 1.6 points, indicating an incredibly tight performance matrix. For maximum credit investment efficiency, the GR GT3 Prototype provides a PI tuning ROI index of 0.38 PI/CR against the 0.50 PI/CR rating of the 911 GT3 RS.
Verified telemetry protocol
Analysis verified by the NKB Japan Telemetry Team โ led by Kaito Sato.
Based on Fansim Build 1.0.4 data logs.