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2015 Mustang 2.3L EcoBoost 4-Cylinder Specs Overview

2015 Mustang 2.3L EcoBoost 4-Cylinder Specs Overview

Defined by the first turbo 4 cylinder motor to be found the Mustang’s hood since the 1986 SVO and the overly impressive 305 horsepower it squeezes out of a mere 2.3 liter engine, the new 2015 EcoBoost Mustang is a game changer.

Some argue a 4 cylinder doesn’t belong in a Mustang and others call it a natural progression, but regardless of which side of the fence you’re on, the 4 cylinder Mustang is here to stay. One thing there’s no arguing about is that it does have Mustang worthy power–the all-new 2.3L EcoBoost 4 cylinder is said to pump out a startling 305HP, 300LBS of torque and will likely weigh less than the 2015 GT and base model V6. That’s 5 more horsepower than the base model V6 will have, and with its turbocharged nature, there’s no denying that some will find ways to increase its power output well past factory rated levels.

Table of Contents
  1. 2015 Mustang – EcoBoost 4 Cylinder Specifications
  2. Dimensions
  3. Engine
  4. Drivetrain
  5. Suspension
  6. Brakes
  7. Wheels and Tires
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Don't let the EcoBoost 4-cylinder fool you; there's plenty of power to be had. The biggest gains are in upgrading the turbo system and a tuner. For smaller gains, consider intake and exhaust upgrades. There's also the suspension and tires of upgrading your EcoBoost to insure your pony can handle the extra horses.

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Rear of 2015 Mustang at Good Morning America

There’s also no denying that Ford is as committed to the 4 cylinder as the 6th generation Mustang will be sold in overseas markets. There’s also no guarantee they’ll be offering all three motors to our friends across the way–upon trying to confirm or rebut this, Ford’s Social Media Manager Scott Monty did not offer any information on which motors would be offered overseas, leading one to believe they would be excluding at least one offering from the lineup, most likely the V6. The European market is also supposed to receive a “stiffer suspension” setup than their US counterparts, according to Ford’s Chief Engineer Frank Davis. Davis also declared the V6 a US-only offering.

For those curious as to where outside the US the Mustang will be sold, see the map below:

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2015 Mustang – EcoBoost 4 Cylinder Specifications

As for performance, the 4 cylinder shares many of its bells and whistles with the GT if not as a standard feature, as an optional performance package upgrade.


Compare (in inches): 2015 Mustang – wheelbase 107.1, length 188.3, width 75.4, height 54.4, front track 62.3, rear track 64.9

2014 Mustang – wheelbase 107.1, length 188.5, width 73.9, height 55.8, front track 62.3, rear track 62.9

Differences (2015 vs 2014 Mustang): (-.2) in overall length(+1.5) in overall width(-1.4) in overall height(+2) in rear track


– 2.3 Liter Ecoboost I4 – 140 cubic inch/2,300 cc

– At or greater than 305HP @ 5,500 rpm, 300 lb foot torque at 2,500-4,500 rpm

– 9.5:1 compression ratio

– aluminum block, aluminum cylinder head

– 3-port integrated into head exhaust manifold

– DOHC: 4 valves per cylinder w/ twin independent variable camshaft timing

– cast-aluminum pistons

– forged steel connecting rods

– 87 octane fuel

– direct injection, 15.5 gallon fuel tank

– takes 6 quarts 5w-30

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- Standard 6 speed manual transmission (Hill Start Assist)

– Gear ratios: 1st: 4..236, 2nd: 2.538, 3rd: 1.665, 4th: 1.238, 5th: 1.00, 6th: 0.704

– Optional 6 speed automatic transmission (with paddle shifters)

– Gear Ratios: 1st: 4.17, 2nd: 2.34, 3rd: 1.52, 4th: 1.14, 5th: 0.87, 6th: 0.69


– Front: double ball joint independent MacPherson strut & tubular sway bar

– Rear: integral-link independent rear suspension with coil springs, solid stabilizer bar & twin or mono tube dampers


– Front: 12.6inch x 33mm vented discs, twin-piston floating aluminum calipers

– Front: Optional Performance Package(standard on 2015 GT): 13.9inch x 12mm vented discs, four piston 46mm fixed aluminum calipers

– Rear: 12.6in x 12mm solid discs, single piston 45mm floating aluminum calipers, integral parking brake

– Rear: Optional Performance Package (standard on 2015 GT): 13inch x 25mm vented discs, single piston 45mm floating iron calipers; parking brake

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Wheels and Tires

– Standard: 17 x 7.5 inch, 235/55R H A/S

Optional: 18×8 with 235/50R W A/S, 18×8.5 with 255/40R W A/S, 20×9 with 265/35R W, summer performance package: 19×9 with 255/40R Y