Muscle per Gallon: Sports Cars

April 2, 2008 RSS Feed Print

To rate cars' mix of performance and fuel economy (the muscle per gallon index), we multiplied the horsepower rating by the city MPG number, then divided by 100.

Rank	Make	Model	Base MSRP	Engine Type	Horsepower	City MPG	Muscle per gallon index
1	Dodge	Viper	$85,210	Gas V10	600	13	78.0
2	Chevrolet	Corvette	$46,100	Gas V8	430	15	64.5
3	Jaguar	XK	$86,035	Gas V8	420	15	63.0
4	Audi	S6	$72,350	Gas V10	435	14	60.9
5	Porsche	911Carrera S	$97,300	Gas Flat 6-cyl	355	17	60.4
6	Porsche	Cayman S	$59,100	Gas Flat 6-cyl	295	20	59.0
7	Audi	S8	$93,300	Gas V10	450	13	58.5
7	Porsche	911 Carrera	$73,500	Gas Flat 6-cyl	325	18	58.5
9	Mercedes-Benz	CLK Coupe	$55,150	Gas V8	382	15	57.3
10	Nissan	350Z	$36,350	Gas V6	306	18	55.1
11	BMW	M5	$82,900	Gas V10	500	11	55.0
12	BMW	6-Series	$75,600	Gas V8	360	15	54.0
13	Porsche	Cayman	$49,400	Gas Flat 6-cyl	245	22	53.9
14	Mercedes-Benz	SL	$95,300	Gas V8	382	14	53.5
15	Porsche	Boxster S	$59,900	Gas Flat 6-cyl	295	18	53.1
16	Mercedes-Benz	SLK	$63,200	Gas V8	355	14	49.7
17	Saturn	Sky	$29,785	Turbo Gas I4	260	19	49.4
17	Pontiac	Solstice	$27,845	Turbo Gas 4-Cyl	260	19	49.4
19	Cadillac	XLR	$80,650	Gas V8	320	15	48.0
19	Jaguar	XK	$74,835	Gas V8	300	16	48.0
19	Lotus	Exige	$64,890	Gas I4	240	20	48.0
22	Audi	S4	$49,710	Gas V8	340	14	47.6
23	Mazda	Speed3	$22,340	Gas I4	263	18	47.3
24	Lexus	SC	$65,455	Gas V8	288	16	46.1
25	BMW	Z4	$42,400	Gas I6	255	18	45.9
26	Mercedes-Benz	SLK	$49,450	Gas V6	268	17	45.6
27	Audi	TT Roadster	$45,900	Gas V6	250	18	45.0
27	Ford	Mustang	$27,260	Gas V8	300	15	45.0
29	Audi	S4	$48,610	Gas V8	340	13	44.2
30	Porsche	Boxster	$49,900	Gas Flat 6-cyl	245	18	44.1
31	Lotus	Exige	$61,000	Gas I4	220	20	44.0
31	Audi	TT Roadster	$36,800	Turbo Gas I4	200	22	44.0
33	Honda	S2000	$37,300	Gas I4	237	18	42.7
34	Audi	TT	$41,500	Gas V6	250	17	42.5
35	Audi	A5	$39,900	Gas V6	265	16	42.4
36	Mitsubishi	Eclipse	$28,599	Gas V6	263	16	42.1
37	Mercedes-Benz	SLK	$44,150	Gas V6	228	17	38.8
38	BMW	Z4	$36,400	Gas I6	215	18	38.7
39	Mazda	RX-8	$26,435	Gas Rotary	232	16	37.1
40	Mazda	MX-5 Miata	$20,585	Gas I4	166	22	36.5
41	Ford	Mustang	$20,720	Gas V6	210	17	35.7
42	Mazda	RX-8	$26,435	Gas Rotary	212	16	33.9
43	Saturn	Sky	$25,525	Gas I4	173	19	32.9
43	Pontiac	Solstice	$22,165	Gas 4-Cyl	173	19	32.9
45	Mitsubishi	Eclipse	$23,799	Gas I4	162	20	32.4
46	Chrysler	Crossfire	$34,735	Gas V6	215	15	32.3
47	Hyundai	Tiburon	$18,125	Gas I4	138	20	27.6
48	Hyundai	Tiburon	$22,375	Gas V6	172	16	27.5