Porsche 718 Cayman GT4 / Toyota GR Supra A90/A91
The Porsche 718 Cayman GT4 makes 414 horsepower and costs $125,000. The Toyota GR Supra A90/A91 makes 387 horsepower and costs $50,000—a $75,000 price gap (150% more expensive for the Porsche) for 27hp more power. Across 86 shared tracks with 263 unique comparison scenarios, the Supra wins by 0.16 seconds overall, and when you filter the comparison data on this page for matched modifications and matched tire treadwear, the GT4 wins 53.7% of battles with a 2.92-second average gap.
This is the closest battle in Porsche GT4 history: mid-engine perfection versus turbocharged value. The GT4 weighs 3,247 lbs. The Supra weighs 3,351 lbs—104 pounds heavier. The GT4 has 27hp more power yet wins only 53.7% of matched battles—a virtual coin flip. The Supra wins 46.3% of the time when everything is equal, and the 0.16-second overall gap (Supra faster) proves these cars are dead even across mixed conditions.
The 27-Horsepower Gap: Mid-Engine vs Turbo Potential
The GT4's 4.0L flat-six makes 414hp at 7,600 rpm and 310 lb-ft at 5,000-6,800 rpm (database shows 429.79 lb-ft, likely with sport exhaust) from a mid-engine layout. Power-to-weight: 7.84 lbs/hp. The Supra's BMW B58 3.0L turbocharged inline-six makes 387hp at 5,800 rpm and 500 lb-ft at 1,600-4,500 rpm. Power-to-weight: 8.66 lbs/hp—a 9.5% disadvantage.
The GT4's mid-engine advantage should dominate—engine behind the driver, telepathic handling, GT3-derived suspension. Yet the Supra wins 46.3% of matched battles and 0.16 seconds overall. The B58's turbocharger delivers 500 lb-ft from 1,600 rpm (190 lb-ft more low-end torque than the GT4) and responds dramatically to modification. When the Supra runs higher mod levels, the battle flips entirely.
What the Filtered Data Reveals
- Matched mod + matched tire (244 laps): GT4 wins 53.7%, Supra wins 46.3%, 2.92s gap. This is the smallest GT4 advantage in any major comparison—the Supra wins nearly half the battles when preparation is equal. The 0.16-second overall gap shrinks to 2.92 seconds when matched, but the GT4's 53.7% win rate is barely better than a coin flip.
- Light GT4 vs heavy Supra, TW200/200 (57 laps): Supra wins 100% with 7.10s gap. When the Supra runs heavy modifications (Stage 2+ tune reaching 500-550hp), it defeats the lightly-modified GT4 entirely. The B58's turbo ceiling transforms the 27hp deficit into a 110-160hp advantage.
- Light GT4 vs medium Supra, TW200/200 (140 laps): Supra wins 54.3% with 4.00s gap. Even when the Supra runs only medium modifications (Stage 1 tune at 450hp), it wins more than half the battles against a lightly-modified GT4. This is the largest scenario by lap count and shows the Supra's tuning potential in action.
The $75,000 Price Gap: Value vs Prestige
GR Supra A90/A91: $50,000 buys the BMW B58's 387hp, 3,351-pound curb weight, and one of the most modification-friendly engines ever built. The B58's ceiling is transformative: Stage 1 tune ($800) = 450hp, Stage 2 with downpipe ($2,500 total) = 500-550hp, upgraded turbo ($6,000-8,000) = 650-700hp. The comparison data proves this—heavily-modified Supras win 100% of battles against lightly-modified GT4s. A $52,500 Supra (purchase + Stage 2) defeats a $125,000 GT4.
718 Cayman GT4: $125,000 buys mid-engine perfection, 414hp, GT3-derived suspension, and Porsche's track-weapon pedigree. The flat-six's modification ceiling reaches 450hp with exhaust ($4,000) + tune ($2,000), but the naturally aspirated architecture can't match the B58's forced induction potential without spending $15,000+ on headers, intake, and aggressive tuning.
The $75,000 premium buys a car that wins 53.7% of matched battles—barely more than half. The Supra's $50,000 entry price leaves $75,000 for modifications that reach 700hp, turning the 46.3% matched loss rate into 100% domination.
The Verdict
Choose the Toyota GR Supra A90/A91 if you want the best performance-per-dollar at $50,000, accept losing 53.7% of stock-vs-stock battles (winning 46.3%—nearly half!), and plan to tune the B58. A $2,500 Stage 2 tune reaches 500-550hp, transforming the virtual tie into complete dominance. The Supra is 0.16 seconds faster overall and wins 46.3% of matched battles for 40% of the price.
Choose the Porsche 718 Cayman GT4 if you have $125,000 to spend, want mid-engine perfection, and prioritize winning 53.7% of stock-vs-stock battles. You're paying $75,000 more (150% premium) for a 3.7-percentage-point advantage when matched—the smallest margin any GT4 has ever recorded. The GT4 is the choice for drivers who want Porsche prestige and can justify $75,000 for a virtual coin flip.
LapMeta's 0.16-second overall gap (Supra faster) and 2.92-second matched-condition gap (GT4 barely ahead) show these cars are dead even. The Supra's 104-pound weight disadvantage and 27hp power deficit create a 46.3% matched win rate—the closest any car has come to beating a GT4 when conditions are equal. For the driver who wants the best value sports car under $55,000, the Supra wins 46% of battles and costs 40% as much. For the driver who wants mid-engine prestige and is willing to pay $75,000 for a 3.7% win rate advantage, the GT4 barely edges out victory.