Muscle per Gallon: Large Cars

We rated cars' mix of performance and fuel economy (the muscle per gallon index).

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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 Lexus GS 450 Hybrid $54,900 Gas/electric V6 292 22 64.2
2 Mercedes-Benz E-Class $85,300 Gas V8 507 12 60.8
3 Jaguar S-Type $64,335 Gas V8 400 15 60.0
4 Lexus GS $52,620 Gas V8 342 17 58.1
5 Mercedes-Benz E-Class $59,700 Gas V8 382 15 57.3
6 Audi A6 $56,300 Gas V8 350 16 56.0
7 Chrysler 300-Series $41,585 Gas V8 425 13 55.3
7 Dodge Charger $36,355 Gas V8 425 13 55.3
9 Lexus GS $46,100 Gas V6 303 18 54.5
10 Pontiac G8 $29,310 Gas V8 361 15 54.2
11 BMW 5-Series $58,500 Gas V8 360 15 54.0
12 Infiniti M $49,350 Gas V8 325 16 52.0
13 Cadillac STS $43,215 Gas V6 302 17 51.3
14 BMW 5-Series $49,400 Turbocharged gas I6 300 17 51.0
15 Toyota Avalon $34,415 Gas V6 268 19 50.9
16 Chrysler 300-Series $35,395 Gas V8 335 15 50.3
16 Dodge Charger $32,855 Gas V8 335 15 50.3
18 Chevrolet Impala $29,030 Gas V8 303 16 48.5
19 Cadillac STS $52,715 Gas V8 320 15 48.0
19 Jaguar S-Type $55,835 Gas V8 300 16 48.0
21 Ford Taurus $27,470 Gas V6 263 18 47.3
21 Mercury Sable $27,570 Gas V6 263 18 47.3
23 Volvo S80 $49,210 Gas V8 311 15 46.7
24 Acura RL $49,900 Gas V6 290 16 46.4
25 Mercede- Benz E-Class $51,200 Gas V6 268 17 45.6
26 Volvo S80 $42,045 Turbocharged gas I6 281 16 45.0
27 Kia Amanti $25,495 Gas V6 264 17 44.9
28 Hyundai Azera $28,550 Gas V6 263 17 44.7
29 Infiniti M $45,100 Gas V6 275 16 44.0
30 Cadillac DTS $50,120 Gas V8 292 15 43.8
31 Pontiac G8 $26,910 Gas V6 256 17 43.5
32 Audi A6 $46,100 Gas V6 255 17 43.4
33 Chrysler 300-Series $31,620 Gas V6 250 17 42.5
34 Hyundai Azera $24,600 Gas V6 234 18 42.1
35 Buick Lucerne $36,510 Gas V8 275 15 41.3
35 Cadillac DTS $46,120 Gas V8 275 15 41.3
37 Jaguar S-Type $48,335 Gas V6 235 17 40.0
38 Chevrolet Impala $22,350 Gas V6 211 18 38.0
39 Volvo S80 $38,705 Gas I6 235 16 37.6
40 Dodge Charger $28,035 Gas V6 250 15 37.5
41 Lincoln Town Car $45,040 Gas/ethanol V8 239 15 35.9
42 Mercury Grand Marquis $28,170 Gas/ethanol V8 224 15 33.6
43 Chrysler 300-Series $24,595 Gas V6 186 18 33.5
44 Buick Lucerne $26,755 Gas V6 197 16 31.5

TAGS:
car manufacturers
cars
fuel efficiency
  • Rick Newman

    Rick Newman is the author of Rebounders: How Winners Pivot From Setback to Success and the co-author of two other books. Follow him on Twitter or e-mail him at rnewman@usnews.com.