How much slower is a car with a passenger?

The middle car of 14,951 is 4.4% slower to 60 mph, simulated with an 80 kg passenger aboard — for that car, the Skoda Karoq 1.0 TSI 110, 10.10 s becomes 10.54 s. That is the middle of the losses, not the middle of the field: the spread is very wide and the median is the honest number here: the Subaru Mini Jumbo 3dr 0.7 37 loses 2.45 s while the Aston Martin DB4 Zagato loses -0.02 s, so an average would be pulled a long way from anything a reader is likely to be driving.

Which car is worst affected?

The Subaru Mini Jumbo 3dr 0.7 37 (1988): 18.68 s to 60 mph normally, 21.13 s with an 80 kg passenger aboard — 2.45 s worse, or 13.1%. These are theoretical times from a physics simulation, not measured runs.

Is any car quicker with an 80 kg passenger aboard?

Yes — 1 of them. The biggest gain is the Aston Martin DB4 Zagato, 0.02 s BETTER. It is not a mistake: those cars are traction-limited, so anything that reduces the power reaching the road also reduces wheelspin, and they leave the line more cleanly than they do at full power. These are theoretical times from a physics simulation, not measured runs.

Does it hit turbocharged and naturally aspirated cars differently?

Yes. Simulated with an 80 kg passenger aboard, forced-induction cars lose 3.9% on average against 5.4% for naturally aspirated ones and 2.7% for electric cars. That gap is the point: a spec sheet quotes one number per car and cannot show it.

Are these real measured times?

No. Both the normal and the passenger figure are produced by the same physics simulation, each car modelled from its published mass, power, drivetrain and gearing and trimmed to its own published acceleration figures. What is meaningful here is the difference between two runs of the same car under rules that differ in exactly one respect.

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What does a passenger cost you?

Run with an 80 kg passenger aboard, the middle car of 14,951 is 4.4% slower to 60 mph — for that car, the Skoda Karoq 1.0 TSI 110, 10.10 s becomes 10.54 s. The worst affected is the Subaru Mini Jumbo 3dr 0.7 37, which loses 2.45 s (13.1%). 1 car is actually quicker, led by the Aston Martin DB4 Zagato at 0.02 s better — a car that was traction-limited gains more from spinning its wheels less than it loses elsewhere.

Simulated, not measured. Every car is run twice under identical rules — once at 20 °C on dry asphalt at sea level, once with an 80 kg passenger aboard — and the difference is what is reported here.

Why it happens

Eighty kilograms is a bigger fraction of a light car than of a heavy one, so the penalty is not the same for everybody. It also does something a spec sheet cannot show: extra weight adds grip as well as mass, so a car that was spinning its wheels can occasionally lose almost nothing.

Worst affected

#	Car	Year	Normal	Passenger	Lost	Worse by
1	Subaru Mini Jumbo 3dr 0.7 37	1988	18.68 s	21.13 s	+2.45 s	13.1%
2	Alpine A110 Berlinette 0.9 51	1962	13.32 s	15.06 s	+1.74 s	13.1%
3	Alpine A108 0.9 50	1958	14.59 s	16.44 s	+1.85 s	12.7%
4	Alpine A110 Berlinette 1.1 95	1962	8.25 s	9.29 s	+1.03 s	12.5%
5	Subaru Mini Jumbo 5dr 0.7 37	1988	18.68 s	20.99 s	+2.30 s	12.3%
6	Citroen AX 3dr 1.0 42	1986	18.92 s	21.16 s	+2.24 s	11.8%
7	Lotus Elan Roadster 1.6 106	1962	8.22 s	9.18 s	+0.96 s	11.7%
8	Citroen AX 5dr 1.0 42	1988	18.92 s	21.13 s	+2.21 s	11.7%
9	Citroen LNA 0.7 35	1978	21.39 s	23.86 s	+2.47 s	11.5%
10	Fiat Panda 0.8 34	1986	20.63 s	23.00 s	+2.37 s	11.5%
11	Citroen AX 3dr 1.1 60 (1986)	1986	11.60 s	12.93 s	+1.33 s	11.4%
12	Citroen AX 5dr 1.1 60 (1988)	1988	11.60 s	12.93 s	+1.33 s	11.4%
13	Subaru Mini Jumbo 3dr 0.8 42	1988	15.33 s	17.08 s	+1.75 s	11.4%
14	Lancia A112 0.9 42	1982	16.78 s	18.69 s	+1.91 s	11.4%
15	Subaru Vivio 3dr 0.7 44	1992	14.44 s	16.07 s	+1.63 s	11.3%
16	Fiat Panda 0.9 45	1981	16.81 s	18.69 s	+1.88 s	11.2%
17	VW Polo 3dr 0.9 40	1975	19.23 s	21.37 s	+2.14 s	11.1%
18	Subaru Mini Jumbo 5dr 0.8 42	1988	15.33 s	17.04 s	+1.70 s	11.1%
19	Subaru Vivio 5dr 0.7 44	1992	14.44 s	16.03 s	+1.58 s	10.9%
20	Fiat Panda 1.0 44	1986	14.50 s	16.08 s	+1.58 s	10.9%
21	Nissan Micra 3dr 1.0 50 (1982)	1982	15.25 s	16.90 s	+1.65 s	10.8%
22	Nissan Micra 3dr 1.0 50 (1989)	1989	15.25 s	16.90 s	+1.65 s	10.8%
23	Renault 5 3dr 0.9 36	1972	21.39 s	23.70 s	+2.31 s	10.8%
24	Fiat 127 0.9 40	1971	18.40 s	20.38 s	+1.98 s	10.8%
25	Lancia A112 1.0 48	1982	15.98 s	17.69 s	+1.71 s	10.7%
26	Honda Jazz/Fit 1.2 45	1983	14.93 s	16.53 s	+1.60 s	10.7%
27	MINI Hatch Cooper 1.3 63	1997	12.52 s	13.86 s	+1.34 s	10.7%
28	SEAT Marbella 0.9 41	1986	17.40 s	19.25 s	+1.85 s	10.7%
29	Fiat Uno 3dr 0.9 45	1983	15.89 s	17.58 s	+1.69 s	10.6%
30	Nissan Micra 5dr 1.0 50	1989	15.25 s	16.87 s	+1.62 s	10.6%
31	Daewoo Tico 0.8	1991	15.84 s	17.51 s	+1.68 s	10.6%
32	Peugeot 205 5dr 1.0 45	1983	16.97 s	18.76 s	+1.80 s	10.6%
33	Fiat 127 0.9 47	1971	16.81 s	18.59 s	+1.78 s	10.6%
34	Daihatsu Trevis 1.0 58	2004	13.63 s	15.07 s	+1.44 s	10.6%
35	Citroen AX 5dr 1.1 54	1988	12.02 s	13.29 s	+1.27 s	10.6%
36	Fiat 127 0.9 45 (1977)	1977	17.31 s	19.13 s	+1.82 s	10.5%
37	VW Polo 3dr 1.1 50	1981	14.00 s	15.48 s	+1.47 s	10.5%
38	VW Polo Coupe 1.0 40	1982	19.23 s	21.24 s	+2.01 s	10.5%
39	Fiat 127 0.9 45 (1971)	1971	17.28 s	19.09 s	+1.81 s	10.5%
40	VW Polo 3dr 1.0 40	1981	19.23 s	21.23 s	+2.01 s	10.4%
41	VW Derby 1.1 50	1977	14.00 s	15.46 s	+1.46 s	10.4%
42	Fiat 127 1.0 50	1977	16.99 s	18.76 s	+1.77 s	10.4%
43	VW Polo 3dr 1.1 60	1975	11.74 s	12.95 s	+1.22 s	10.4%
44	Fiat Cinquecento 0.9 39	1991	16.27 s	17.96 s	+1.68 s	10.3%
45	Maruti Suzuki Alto 0.8 47	2000	17.97 s	19.83 s	+1.86 s	10.3%
46	Citroen AX 3dr 1.4 65	1986	10.36 s	11.42 s	+1.07 s	10.3%
47	Lancia A112 Abarth 1.1	1984	11.74 s	12.95 s	+1.21 s	10.3%
48	Fiat Seicento 0.9 39	1998	16.28 s	17.95 s	+1.68 s	10.3%
49	Citroen AX 3dr 1.1 60 (1991)	1991	10.35 s	11.42 s	+1.07 s	10.3%
50	Ford Fiesta 3dr 1.0 45	1986	17.97 s	19.82 s	+1.85 s	10.3%
51	Daihatsu Move 0.8 42	1997	17.45 s	19.25 s	+1.80 s	10.3%
52	Peugeot 104 1.0 45	1972	17.49 s	19.28 s	+1.80 s	10.3%
53	Citroen AX 3dr 1.4 69	1986	11.10 s	12.24 s	+1.14 s	10.3%
54	Peugeot 205 3dr 1.1 54	1984	13.25 s	14.61 s	+1.36 s	10.3%
55	Peugeot 205 3dr 1.0 45	1984	17.11 s	18.85 s	+1.74 s	10.2%
56	Citroen AX 3dr 1.4 D 53	1986	12.37 s	13.63 s	+1.26 s	10.2%
57	Fiat Panda 0.9 40	1986	16.28 s	17.93 s	+1.66 s	10.2%
58	VW Polo 3dr 1.3 75 (1981)	1981	10.49 s	11.56 s	+1.07 s	10.2%
59	VW Derby 1.3 60	1977	11.74 s	12.93 s	+1.19 s	10.2%
60	VW Polo 3dr 1.3 60	1981	11.83 s	13.03 s	+1.20 s	10.2%

Ranked by how much of its own 0-60 each car gives away, not by seconds — otherwise the list would simply be the slowest cars in the set.

Least affected — and the ones that gain

#	Car	Year	Normal	Passenger	Lost	Worse by
1	Aston Martin DB4 Zagato	1960	8.49 s	8.47 s	+-0.02 s	-0.2%
2	Caterham Super Seven RST V8-Levante Supercharged	2004	2.93 s	2.92 s	+-0.00 s	-0.2%
3	Stealth B6	2000	3.26 s	3.25 s	+-0.00 s	-0.1%
4	Porsche 911 GT1-98 Straßenversion 996	1998	3.52 s	3.51 s	+-0.00 s	-0.1%
5	Porsche 911 GT1 993	1996	3.65 s	3.65 s	+-0.00 s	-0.1%
6	9ff GTurbo R	2011	3.24 s	3.23 s	+-0.00 s	-0.1%
7	Ad Tramontana Tramontana R	2009	3.30 s	3.30 s	+-0.00 s	-0.1%
8	Lotec C1000	1991	3.43 s	3.42 s	+-0.00 s	-0.1%
9	9ff V400 996	2004	4.01 s	4.01 s	+-0.00 s	-0.1%
10	Isotta Fraschini Tipo 6 LMH Strada	2024	2.49 s	2.49 s	+-0.00 s	-0.1%
11	Praga Bohema	2023	3.06 s	3.06 s	+-0.00 s	-0.1%
12	Gumpert Apollo Sport	2007	3.24 s	3.24 s	+-0.00 s	-0.1%
13	Pagani Huayra BC Roadster	2019	3.32 s	3.32 s	+-0.00 s	-0.1%
14	Porsche 911 GT1 Straßenversion 996	1997	3.51 s	3.51 s	+-0.00 s	-0.1%
15	Lotec Sirius	2015	3.37 s	3.37 s	+-0.00 s	-0.1%
16	9ff Speed9	2009	3.64 s	3.64 s	+-0.00 s	-0.1%
17	9ff GT9 CS	2008	3.37 s	3.37 s	+-0.00 s	-0.1%
18	Radical RXC Turbo 500	2015	3.56 s	3.56 s	+-0.00 s	-0.1%
19	Mclaren 765LT	2020	2.69 s	2.69 s	+-0.00 s	-0.1%
20	Ferrari 296 Speciale A	2026	2.51 s	2.51 s	+-0.00 s	-0.1%

A negative figure is a car that is quicker with an 80 kg passenger aboard. Those cars are traction-limited: less power reaching the road means less wheelspin, and they leave the line more cleanly for it.

Subaru Mini Jumbo 3dr 0.7 37 Alpine A110 Berlinette 0.9 51

The two that suffer most, on the line together. Set the surface and the weather yourself and watch what it does.

Questions

How much slower is a car with a passenger?: The middle car of 14,951 is 4.4% slower to 60 mph, simulated with an 80 kg passenger aboard — for that car, the Skoda Karoq 1.0 TSI 110, 10.10 s becomes 10.54 s. That is the middle of the losses, not the middle of the field: the spread is very wide and the median is the honest number here: the Subaru Mini Jumbo 3dr 0.7 37 loses 2.45 s while the Aston Martin DB4 Zagato loses -0.02 s, so an average would be pulled a long way from anything a reader is likely to be driving.
Which car is worst affected?: The Subaru Mini Jumbo 3dr 0.7 37 (1988): 18.68 s to 60 mph normally, 21.13 s with an 80 kg passenger aboard — 2.45 s worse, or 13.1%. These are theoretical times from a physics simulation, not measured runs.
Is any car quicker with an 80 kg passenger aboard?: Yes — 1 of them. The biggest gain is the Aston Martin DB4 Zagato, 0.02 s BETTER. It is not a mistake: those cars are traction-limited, so anything that reduces the power reaching the road also reduces wheelspin, and they leave the line more cleanly than they do at full power. These are theoretical times from a physics simulation, not measured runs.
Does it hit turbocharged and naturally aspirated cars differently?: Yes. Simulated with an 80 kg passenger aboard, forced-induction cars lose 3.9% on average against 5.4% for naturally aspirated ones and 2.7% for electric cars. That gap is the point: a spec sheet quotes one number per car and cannot show it.
Are these real measured times?: No. Both the normal and the passenger figure are produced by the same physics simulation, each car modelled from its published mass, power, drivetrain and gearing and trimmed to its own published acceleration figures. What is meaningful here is the difference between two runs of the same car under rules that differ in exactly one respect.

Figures regenerated 2026-10-12. Every number on this page is computed by the simulator at build time, so the page and the app can never disagree.