What Do You Get When You Average All Your Cars Together? Autopian Asks

Aa Averages
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When the car world talks about fleet averages, they tend to be in the somewhat dull context of bureaucratically altered fuel economy figures. Not here at The Autopian. We’re looking to spice things up a bit, and want to know what your fleet averages are for anything you care to share. Cylinders, horsepower, curb weight, even wheels … as much fun data as you can supply.

Calculating these averages is pretty easy. Take a category, add up the respective figures for all your vehicles, then divide by the number of vehicles in your fleet. Let me give you a few examples:

I currently own a 2006 BMW 325i and a 1999 Porsche Boxster, so my fleet averages look like this:

Cylinders: Six

Displacement: 2.75 liters

Horsepower: 208

Curb weight: 3,017.5 pounds

Combined fuel economy: 20.5 mpg

Seats: 3.5

From there, we can go even further, by using those figures to get even more data. How about 75.6 horsepower per liter, or 14.5 pounds per horsepower? Now those seem like more interesting fleet average figures than just fuel economy with modifiers for advanced technologies and footprint.

Img 4982 Cropped

Admittedly, these aren’t hugely exciting averages, but chances are you likely have some good ones. After all, readers like you are awesome and sometimes have incredible assortments of machines. So go on, let’s see your fleet averages. What you got?

(Photo credits: Thomas Hundal)

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104 thoughts on “What Do You Get When You Average All Your Cars Together? Autopian Asks

  1. 1929 Ford Model A (VQ35DE and manual trans from a ’03 Nissan 350z)
    1964 Dodge Polara (318 Poly & Push-Button Torqueflite 727)
    1968 Chevy C20 (Chevy 350 & Saginaw 4 Speed)
    1970 Chevy C10 (Chevy 350 & TH350)
    1987 Camaro Z28 (Chevy 305 & 700R4)
    1994 Yamaha Virago (V Twin Shaft drive)
    2013 Scion FR-S (FA20 & manual trans)

    I’ve omitted my wife’s 2013 Jetta as she has the only sensible vehicle at the house, and this is purely for the nonsense I drive.

    Average Model Year: 1975
    Total Cylinders: 44
    Average Number of Cylinders: 6.29
    Average Number of Doors: 1.71
    Avg Curb Weight (yes the bike drags this down, but the trucks somewhat balance it out): 2711 lbs
    Average Number of Forward Gears: 4.43
    Average Number of Reverse Gears: 0.86
    Average (physically installed) seats: 1.8
    Total inches lowered from stock ride height: 27
    Average inches lowered from stock ride height: 3.86
    Average number with full roll cages: 0.14
    Average number with fuel injection: 0.28
    Average Number I’ve managed to leave stock and not ruin: 0
    Average Percentage Running: As of last weekend, for the first time in my life, 100% (though the Model A isn’t exactly drivable without brakes and a driveshaft, but who’s counting)

      1. Thanks man! Its been a pretty big project and learning experience- I actually do have an IG- my personal one can be found under “racecar_steve”, and I have second page where I’m working on other people’s cars under “thehotrodhandyman”

  2. I’m not doing the math but I’ve got a motorcycle, a convertible, a VQ-powered rwd coupe, 2 crossovers (one is a Murano), and a 4×4…

    The average of my fleet is a Nissan Murano CrossCabriolet with off-road tires.

  3. If I had to average the four cars I own right now together, it would be:

    AVG MPG: 22
    Seats: 5.25
    Avg HP: 128HP

    My 89 Ford Country Squire and 93 Geo Tracker completely destroy any average the 2011 Honda Fit and 2007 Honda Element would ever contribute.

    2007 Honda Element:
    MPG: 23 Avg
    Seats: 4
    HP: 166

    2011 Honda Fit
    MPG: 31 – According to the Car’s computer
    Seats: 5
    HP: 117

    1993 Geo Tracker
    MPG: 24
    Seats: 4
    HP: 80

    1989 Ford LTD Country Squire:
    MPG: 13 – According to the Car’s Computer LOL
    Seats: 8
    HP: 150

  4. Ok weirdly I already have a spreadsheet that does this (don’t judge haha)
    Current fleet is a 84 Saab 900, 87 Alfa Spider, 89 Isuzu Piazza, 01 Land Rover Discovery, and a 13 Volvo C30.

    Year: 1995
    Doors: 3
    Years owned: 7.8
    Inflation adjusted MSRP: $41,945
    Number of cylinders: 5
    Displacement: 2.5L
    HP: 177HP
    Torque: 209lbft
    Gears: 5
    Fuel tank: 16.9 gallons
    Weight: 3104 lbs
    Length: 175.6″
    Width: 68.2″
    Height: 58.2″
    Wheelbase: 97.5″
    Ground clearance: 6.8″

    So… seems like my average vehicle is a 2.5L 90s 5-cylinder, 5-speed hatchback? I’d drive that… Sounds like something Volvo would make.

    1. You very nearly described a manual 850 wagon, just a wee bit high on the displacement and short on length. I loved my ’96 850 wagon, so I’d rock that.

  5. 2 Cars (1994 Corvette/2005 Elise)
    Cylinders: 6
    Displacement: 3.75
    Horsepower: 245
    Torque: 236
    Seats: 2
    Gears: 6
    Fuel Economy: 25-ish?
    Weight: ~2600 pounds

    Wow that’s basically like if I owned a 964.

  6. After crunching the numbers for a fleet that spans the years 1967 to 1983 with vehicles from the US, the UK, the Netherlands, Sweden, and France, it appears I could have achieved similar results for a lot less effort by just getting myself a 1977 Austin Maxi.

      1. That’s the problem with averages. With everything from a single-cylinder 125cc French microcar to an International 3/4-ton pickup with a 345 cubic-inch V8 in the mix, the extremes cancel and the result is more or less a 1977 Austin Maxi.

  7. The 2018 Honda Fitline

    It’s got a 2.5L 5-cyl, good for 205 hp @ 6300 RPM and 188 ft/lb @ 4650 RPM, driving 3 of the 4 wheels. It gets a respectable 26 mpg city and 33 mpg highway. It’s 185″ long with a 112″ wheelbase. It weighs 3490 lbs and can tow 2500 lbs. This mini-ute is the perfect car for the urban-DIYer and confused mini-van enthusiast.

    Sources: 2021 Honda Ridgeline and 2016 Honda Fit.

  8. 19 Insight, 01 Wrangler. 99 MX5, 48 CJ2a
    Averages
    HP 135.
    Displ. 2.375 L
    Doors 2 – (CJ2a has 0)
    length 155.75″
    Wheelbase 92.2″
    MPG 28
    Permanent hard tops .25
    Driven wheels 3
    Age 32

  9. Over 8 cars, I have an average of 6.25 cylinders per vehicle, 3.95 Liters of displacement per vehicle, 3.5 doors per vehicle, I haven’t left things stock so I can’t accurately calculate HP since I haven’t dyoned anything, nor fuel mileage because I usually don’t track it unless I’m on a long trip.

    Although I do have an average of 1.6 superchargers per vehicle, 2.66666 Head-Up Display units per vehicle, as well as 1.5 camshafts per vehicle, .25 sunroofs per vehicle, and also 1.5 exhaust tips per vehicle.

      1. It’s not anything exciting like 5 of my cars being Dodge Demons or anything, five of eight are supercharged 3800s. But whine is whine, right?

        1. Whine is definitely whine! I’m kinda aiming to join the club next year myself.
          >I thought maybe you were a mad scientist type with multiple ‘chargers on a few vehicles.

          1. Maybe one day, I know a couple people who’ve twincharged 3800s, the twin M90 has floated around as an idea in the heads of many as well. I’m more of a resourceful parts guy than a custom fabricator, but one day inspiration may strike?

  10. Cylinders: 5
    degrees between banks: 90
    driven wheels: 3
    wheels with limited slip:2
    seats: 3.5
    hp:230
    torque: 212
    weight* : 3120
    roll-up windows:3
    doors: 3
    smiles: yes 🙂

    *includes driver, tools, obligatory dog. Scale in 20lb increments

  11. Was fun to look up all the specs of my 4 cars. 2004 LS430, 2005 Forester, 2022 Explorer, 2023 Escape

    Averages and some things I found interesting:

    Cylinders – 4.75
    Disp – 2.7L
    HP – 234
    TQ – 249
    Gears – 7
    Curb – 3692 lbs – new Escape only weighs 150 lbs more than the Forester
    MPG – 23.3
    HP/L – 96 – new turbo 4 cars put out double the power/liter than the old NA ones
    LB/HP – 16.4

  12. Let’s see, 2 cars 1 truck, not counting the motorcycles.
    cylinders, 6, one each I4 V6 V8
    age 16.66, 2002,2003, 2016 1/2 model years
    length 207 inches, truck is over 20′ and skews average
    gas mileage meh, about 16

  13. I thought you were going to display some horrific homogomation of all cars in one image.

    In other words, the cybertruck

  14. Current Averages (all operational):
    Cylinders: 6 (i6/v8/v8/i4t/f6tt/i4t+e)
    Displacement: 3.37 (2.5/5.7/4.7/2.3/3.0/2.0)
    Doors: 2.33 (2/2/2/2/2/4)
    HP: 336 (189/325/444/300/379/381)
    Weight: 3,869 (3351/3502/3329/4719/3254/5060)
    Seats: 3.8 (4/4/2/4/4*/5)
    MPG: 22.67 (23/17/15/21/20/40)

  15. Our current fleet is five strong: ’65 Corvair Monza Sport Sedan (110/PG); ’87 Saab 900 SPG; ’03 BMW 525iAT; ’03 BMW 530iA; ’16 BMW i3 BEV.

    Avg. wheelbase: 106.2″ (closest: Corvair, 108″)
    Avg. overall length: 180.5″ (closest: Corvair, 183.3″)
    Avg. curb weight: 3,085 lb. (closest: Saab, 2,875 lb.)
    Avg. no. doors: 4.2 (closest: Corvair/530i, 4)
    Avg. no. seats: 4.4 (closest: Corvair/Saab/i3, 4)
    Avg. cylinder count: 4.4 (closest: Saab, 4)
    Avg. displacement: 2028 cc (closest: Saab, 1985 cc)
    Avg. horsepower: 170 (closest: i3, 168 HP)
    Avg. torque (lb./ft.): 186 (closest: i3, 184)
    Avg. no. fwd. gears: 3.6 (closest: Saab/525iT/530i, 5—though nearly a wash with the 2-speed Corvair!)
    Avg. combined city/hwy MPG: 39.9 (closest: Saab, 21.6—this was thrown way off by the i3)
    Avg. 0-60 time: 8.9 sec. (closest: 525iT, 9.2 sec.)

    So the closest car to “average” overall within our group, coming closest in six categories, is the Saab 900 SPG. Hard to argue with that as a baseline.

    1. Ooh, adding this one in:

      Avg. age: 29 years (which perfectly splits the difference between the 37-year-old Saab and the two 21-year-old Bimmers)

      Gawd, when did everybody get so old? I remember when it was just me and the Corvair; it was 38, and I was a mere 17….

  16. Fun!

    Cylinders: 3.5
    Displacement: 1.42L
    HP: 126
    Curb: 1779
    EPA: 40.5
    Seats: 2.75

    2022 Outback XT, 1999 Miata, 2015 Honda NC700X, 1974 Honda CB550.

  17. Cylinders: 5.5 (3,4,5,10)
    Seats: 2.75 (2, 2, 5, 2)
    Wheel size 16.25 (14, 15, 17, 18/19 staggered)
    Horsepower: 283.25 (73, 135, 450, 475)
    Torque: 296.5 (91, 120, 450, 525)
    Engine Displacement: 3.25L (1, 1.8, 2.2, 8)
    Weight: 2887.5lbs (1850, 2400, 3950, 3350)
    Gears: 5.25 (5, 5, 5, 6)
    Hwy Fuel Economy: 34mpg (61, 31, 22, 22)
    Average age: 26

    Seems like I would have a fun little sports car if I put them all together

  18. Cylinders: 7.6 (8×4+6)
    Displacement: 5.18 liters
    Horsepower: 284
    Seats: 5.6
    Forward Gears: 4.8
    Age: 22 (1978, 2002, 2005, 2013, 2014)
    Fraction currently running: 40% (Shame, shame!)

  19. I can only have one vehicle at a time, so I’ll have to average it out historically between the NA, Bugeye, B5, M235i and 986.

    Cylinders: 4.8
    Displacement: 2.28L
    Horsepower: 243
    Driven wheels: 2.8
    Differentials: 1.8
    Gears: 5.6
    Seats (total): 3.6
    Seats (heated): 1.2
    Weight: 2991lb
    Weight distribution: 54% front
    Doors: 2.8
    Turbochargers: 0.6
    Valves per cylinder: 4.2
    Valves total: 20
    Camshafts: 2.8
    Cylinder banks: 1.4
    Trunks: 1.2
    Windows (including back glass and windshield): 6, or 5.6 if flexible plastic is excluded
    Number of vents (including grilles, scoops and visible brake/wheel aero ducts): 4.8

  20. Cylinders: 5
    Displacement: 2.75 liters
    Horsepower: 230
    Curb weight: 4006 pounds
    Combined fuel economy: 23 mpg
    Seats: 5

    ’21 CRV and ’18 4Runner – so different. The CRV is quick and responsive in comparison to the 4Runner, but at 17.5 lbs per horsepower vs. 17.7 for the 4Runner, you’d think they would be equal.

  21. Ok, let’s see. This is just counting the three vehicles with my name on the title.
    Cylinders: 6
    Spark plugs: 13
    Stereo wattage: 233
    Fog lights: 1.33
    Driven wheels: 2.66
    Lug nuts: 20
    0-60 (approximate): 10.9 seconds
    Sunroofs: 0.33
    Air filter elements: 1.33
    Cupholders: 2.33
    Steering wheel spokes: 3.66
    HVAC fan speeds: also 3.66

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