AC cars with highest power to weight ratio

Most accurate predictor of acceleration is power to weight ratio. The more power engine can produce and the less mass it has to accelerate, the quicker the acceleration.

For low speed acceleration and acceleration from standstill, traction also plays important role. Aerodynamic drag takes over as dominating factor at high speed.

Everything in between is where power to weight ratio matters the most. Mid-range acceleration is also important for track performance.

#	make & model	Hp/tonne▼
1.	2009 AC Cobra MK VI GTSR	784
2.	2026 AC GT Super Sport	707
3.	2010 AC Cobra GTS	623
4.	2009 AC Cobra MK VI GT Big Block	610
5.	2020 AC Cobra Series 4 Electric	583
6.	1994 AC Cobra MK III 460 Street Competition	581
7.	2020 AC Cobra Series 3 Electric	495
8.	2001 AC Mamba Coupe	481
9.	2025 AC Cobra GTS	474
10.	2017 AC Cobra 378	472
11.	2000 AC Cobra 212 S/C	389
12.	2020 AC Cobra Series 2 Electric	359
13.	1966 AC Cobra 427	357
14.	1962 AC Shelby Cobra 260	348
15.	2025 AC Ace	345
16.	2020 AC Ace RS Electric	344
17.	2023 AC Cobra GT	329
18.	1992 AC Cobra Lightweight 5.0	300
19.	2012 AC 378 GT Zagato	292
20.	1963 AC Cobra 289	277
21.	1965 AC 428 Convertible	233
22.	1999 AC Ace 5.0 V8	231
23.	1961 AC Ace RS	231
24.	1953 AC Ace 2.6	215
25.	1998 AC Cobra 302 CRS	214
26.	1998 AC Aceca	214
27.	2020 AC Cobra Series 1 Electric	192
28.	1993 AC Ace Brooklands	183
29.	1956 AC Aceca Ghia-Aigle	162
30.	1957 AC Ace Bristol Zagato	136
31.	1973 AC 3000ME	136
32.	1960 AC Aceca Bristol	126
33.	1959 AC Greyhound	100
34.	1971 AC Model 70 Invacar	99
35.	1955 AC Aceca	92
36.	1932 AC 16/90	74
37.	1929 AC Acedes-Magna Tourer	64
38.	1932 AC 16/80	60
39.	1904 AC Autocarrier	56
40.	1932 AC 16/70	49