The BoP 2026 6 Hours at The Glen has just redefined class boundaries: the Aston Martin Valkyrie will now meet the GTP/Hypercar minimum with a weight of 1,020 kg— the first time the floor has been breached.
Weight Breaks and Power Gains
Porsche’s 963 sees its 2026 homologation insert the largest power’s lift, rising to 520 kW and contributing a 13 kg weight increase to 1,073 kg.
The BMW M Hybrid V8 sheds 18 kg, dropping to 1,030 kg, and gains an additional 15 kW for a 503.88 kW cap.
Cadillac’s V‑Series.R car appears 1,032 kg and chimes in at 514.80 kW with a 19.76 kW upswing.
Acura’s ARX‑06 maintains 1,045 kg, but its 517.92 kW tranche receives a 17.68 kW spike.
The contrasting 2025‑spec Porsche 963 plate is 1,058 kg with a 505.96 kW option, whereas the newer 2026 model meets 520 kW while coming in at 1,073 kg.
Low‑Speed Performance
Below 240 kph, the Aston Martin retains a 1.962 kg/kW ratio, the most favourable across the field.
BMW follows with 2.044, just above the 2.025‑level power‑to‑weight for the high‑speed threshold.
Cadillac and Acura sit behind at 2.018 and 2.005 respectively, each struggling with weight increases.
Porsche 963 and 963‑old own the steepest ratios, 2.063 and 2.091, propelled by reduced weight and boosted power.
Strikingly, Aston Martin’s sub‑homologation weight propels it past the historic 1.981 kg/kW figure, setting a new class standard.
High‑Speed Adjustments
Top‑speed BoP grants the V‑Series.R a -0.092 kg/kW advantage, while Acura benefits from a -0.083 figure.
BMW’s -0.065 and Porsche’s -0.052 adjustments narrow gaps, ceding the benchmark for the sector.
Valkyrie’s -0.019 deduction remains the smallest, emphasizing the weight margin’s impact on sustained speed.
The 2026‑spec 963’s 520 kW finish lifts it to the strongest high‑speed ratio seen since the season start, despite carrying an extra 13 kg.
Cadillac and Acura surpass their Daytona baselines, an unexpected turnaround after earlier lower‑speed losses.
Impact on Key Contenders
Porsche’s dual–stake shift creates a polar the ground: its legacy 480 kW floor becomes a 520 kW spread at the cost of an additional 13 kg, a trade‑off that will be tested in the long, sweeping sections of Watkins Glen.
BMW’s 18‑kg drop and 15 kW gain position it as the engine‑poundier, yet its lower‑speed deficit may nullify the advantage in tight corners.
Aston Martin remains the only car to keep a 10‑kg weight break, but its high‑speed advantage diminishes thanks to comparative power reductions.
Cadillac and Acura, though leading in raw horsepower, face truncated power‑to‑weight budgets after winter updates, raising uncertainty in the extended corners.
The 2025‑spec Porsche 963, stripped to 505.96 kW, remains the primary reference for earlier season performance, now edged out by the 2026 car’s 520 kW allotment.
BoP 2026 6 Hours at The Glen Overview
| Car | Min. Weight (kg) | Max Power (kW) | Max Engine Speed (rpm) | Max Energy per Stint (MJ) | Fuel Replenishment (MJ/s) |
|---|---|---|---|---|---|
| Acura ARX‑06 | 1,045 – 6 kg / +7 kg | 517.92 kW (+17.68 kW / –2.08 kW) | 9,512 | 911 ± 4 | 22.775 ± 0.100 |
| Aston Martin Valkyrie | 1,020 – 10 kg / –10 kg | 520.00 kW (± 0.00 kW) | 8,400 | 914 ± 5 | 22.850 ± 0.125 |
| BMW M Hybrid V8 | 1,030 – 1 kg / –18 kg | 503.88 kW (+15.08 kW / +3.12 kW) | 8,000 | 901 ± 5 | 22.525 ± 0.125 |
| Cadillac V‑Series.R | 1,032 – 6 kg / +2 kg | 514.80 kW (+19.76 kW / –5.20 kW) | 8,800 | 903 ± 7 | 22.575 ± 0.175 |
| Porsche 963 (old) | 1,058 – 24 kg / –2 kg | 505.96 kW (-5.20 kW / +26.00 kW) | 8,158 | 909 ± 5 | 22.725 ± 0.125 |
| Porsche 963 (new) | 1,073 – 27 kg / +13 kg | 520.00 kW (+40.04 kW / +0.00 kW) | 8,158 | 913 ± 3 | 22.825 ± 0.075 |
For further background on Aston Martin’s developmental context, see the Motorsport article here.
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