2015 Ford Mustang EcoBoost Convertible Review - No Respect

Mark Stevenson
by Mark Stevenson

I pull up next to a previous-generation Mustang — its 5-liter V8 rumbling as it sits at a stop light — and look over to the driver. There is no acknowledgement from him that I exist. Not a nod, glance, nor a typical, Mustang-owner two-finger wave.

That’s not surprising though — he probably couldn’t hear me.

The 2.3-liter EcoBoost inline four is but a whimper next to the eight cylinders of Detroit aluminum. I give the boosted four banger a slight tip of accelerator. Still nothing from the owner of the “five-point-oh.”

The Tester

2015 Ford Mustang Convertible EcoBoost Premium (Automatic)

Engine: 2.3-liter DOHC I-4, direct injection, twin independent variable camshaft timing (310 horsepower @ 5,500 rpm, 320 lbs-ft @ 2,500-4,500 rpm)

Transmission: 6-speed automatic with paddle shifters

Fuel Economy (Rating, MPG): 20 city/30 highway/24 combined

Fuel Economy (Observed, MPG): 23.3 mpg, approx. 70 percent highway

Options: 201A Equipment Group (Shaker Pro Audio System, Memory Driver’s Seat and Mirrors, Blind Spot Information System with cross-traffic alert), Triple Yellow paint, 50 Years Appearance Package, EcoBoost Performance Package, Enhanced Security Package Active Anti­, Theft System with Perimeter Alarm, HID Headlamps with Signature Lighting, Reverse Sensing System, Spoiler Delete, Wheel Locking Kit, 3.55 Limited-Slip Rear Axle, 19-inch-by-9-inch Gloss Black Premium Painted Aluminum Wheels, Raven Black interior, Adaptive Cruise Control with Collision Mitigation and Rain­ Sensing Wipers, SYNC with MyFord Touch, Voice­Activated Navigation System, Premium AM/FM Stereo with HD Radio.

As Tested (U.S.): $45,060 ( sheet)

As Tested (Canada): $52,649 ( sheet)

It isn’t until the light turns green that my newfound nemesis in the neighboring lane graces me with a single eyeball. Even with the EcoBoost’s bright yellow paint, a pass is required to command the 5-liter’s driver to look to his right and gaze upon my taillights.

Admittedly, this is a very specific scenario. During normal driving, when other Mustang owners are traveling in the opposite direction, any Mustang — no matter the vintage — is still due its two finger, steering-wheel salute. Unless you’re driving a Mustang II.


The front fascia of the Mustang is all modern. New headlights. New grille. This is the new look for Ford’s pony car going forward. While I don’t think this is a design Ford will look back on in 2050 and say, “Hey, we should make a retro-modern version of this,” it’s still a much more streamlined than the upright front with its recessed headlights that have graced the faces of Mustangs for the last two generations.

The headlights give the Mustang a purposeful, angry demeanor, while the long hood foretells of engines upwards of eight cylinders, though that hood is a bit of a lie in this case.

On our convertible tester, the looks are greatly improved as soon as you drop the top. There is no cover for the folded roof, but it is neatly packed away behind the rear seats — unlike the Beetle Convertible — and doesn’t really require a covering. The belt line is rather high, but it works in this case. The Mustang is a big-bodied pony car and it should have as much sheet metal as is possible.

The convertible, I’d argue, has a better silhouette than the new coupe. Instead of the awkward rear-window profile, the convertible offers a flatter and seemingly longer, deck lid. Our tester, with the EcoBoost Performance Package and 50 Years Appearance Package had its rear spoiler deleted, which made for one of the cleanest looking forms of the Mustang money can buy.

My only qualms with the Mustang’s design have to do with the rear. The designers at Ford had an opportunity to go all new with their latest creation, but the rear is still stuck in the past.


Thank you Ford, for real, honest-to-goodness controls. What the Mustang offers up is incredibly user friendly and — save the outgoing version of SYNC with MyFord Touch — amazingly intuitive. The steering wheel controls are not as simple as those in the Dodge Charger I reviewed last week, though there’s definitely nothing wrong with the buttons festooned to the wheel in the Mustang. More options need more buttons.

Below the large MyFord Touch screen and HVAC controls sits a row of toggle switches to change driving mode, steering effort and a few other options. I would prefer these be closer to the driver and out of reach of any underage passengers trying to be clever by flipping between Comfort and Sport steering modes mid-corner.

Another pet peeve: Ford has decided to put the boost gauge right in the middle of the dash, far outside the peripheral vision of the driver. Please, Ford, put this in the instrument panel. At the very least, this could be one of the performance gauges offered up by the digital display between the speedometer and tachometer.

The seats are, well, just fair. I found myself constantly readjusting in order to be comfortable. Also, thanks to the speedometer and tachometer being fairly far apart from each other, the view through the steering wheel to the gauges can be compromised by the steering wheel itself.

The phrase “backseat comfort” in a car like this is an oxymoron, so I’m not even going to mention it.


As previously mentioned, the Mustang makes do with the outgoing version of SYNC and MyFord Touch. While other reviewers have called out Ford’s system for being a confusing, four-cornered mix mash, I’ve never had any serious usability problems with Ford’s infotainment system. If anything, my experience has been nothing but glowing — though not due to the screen itself.

SYNC’s voice-activation feature is one of the best systems for people like me who have horrible regional accents. Somehow, whether it be the folks at Ford or Microsoft (the company responsible for the software guts of SYNC) the system is able to figure out how to cut through all my weird ‘ar‘ combinations and other oddball dialectical artifacts.

Beyond that, the optional Shaker audio system might sound great in the coupe, but in the Mustang convertible it sounds like a tinny mess. If you can avoid the extra cost, do so.


And now we get to the crux of this particular Mustang: its engine.

Ford’s new found love for turbocharging, combined with its “One Ford” plan to send Mustangs to Europe, has resulted in a four-cylinder Mustang with a twin-scroll turbocharger hanging off its side. On top of that, this engine is considered to be a premium choice over the 3.7-liter V6 engine.

Sitting them side by side, the EcoBoost four does, in fact, make more horsepower and torque. However, the quality of how it delivers that power and its attack on your senses is not something I would call premium.

For starters, the EcoBoost engine — even with faux exhaust note pumped through the Shaker audio system — sounds like any other four-cylinder engine on the market. Neither the engine nor exhaust notes are pleasing to the ear. Remember back when Hondas and Acuras would activate all the VTEC goodness at the top RPMs? Remember how great that sounded? The exact opposite is happening here.

That’s not to say the EcoBoost mill is a horrible engine. If your plan is to putt around town and stay out of the boost, the little four pot will return some pretty excellent fuel economy, even with the six-speed automatic. But, if you are looking for an experience pleasing to the ear, get a 6- or 8-cylinder engine.


I drove the Mustang the week following the Charger, and while I called the Dodge a “four-door pony car,” the two cars are definitely not in the same league.

For starters, the Mustang still sports a stiff ride, even with its new-fangled independent rear suspension. Handling might be improved, but the convertible still communicates a fair amount of chassis flex. With the top up, the Mustang isn’t even close to quiet; in truth, it even seemed quieter with the top down. It’s still a Mustang, foibles and all.

If the V6, automatic, convertible Mustang is the Cheerleader Edition of the Ford’s pony car, this EcoBoost-powered version is for the cheerleader that munches on Adderall from a Pez dispenser. It’s high-strung when pushed, but relaxed when it needs to be. The only time it sounds good is when you can’t hear it. And, to top it all off, this car is nearly $50,000. That’s fifty grand for a four cylinder.

Get the six. Save your money. Invest in the improved auditory experience for yourself and others. Turbocharging is not the answer — at least in this case.

Mark Stevenson
Mark Stevenson

More by Mark Stevenson

Join the conversation
2 of 134 comments
  • Elusivellama Elusivellama on Jul 29, 2015

    Where is the 2015 Mustang GT review on TTAC? I can't seem to find it.

  • EapenD EapenD on Apr 05, 2016

    This Mustang roadster is undoubtedly a snazzy looking beast. The interior styling is also classy. Hopefully, it also handles the draft well at high speeds. Well, for my kind of countryside weather, an additional wind deflector like a Windblox windblocker may be required to rein in the turbulence.

  • Jkross22 I know this is TTAC, but shouldn't the US government and the politicians we elect be more focused on more pressing issues? I'll just spitball a few, less politically charged ones for fun..... Why can't the FAA hold Boeing and the airlines accountable for flying planes with bolts that don't come undone and wings that don't fall apart? What about crime and homelessness and inflation and cost of secondary education at public colleges and trade schools? Yeah, yeah, we don't want the Chinese to run over domestic car makers. Go tell Ford and GM. They've contributed to the concern. Is Stellantis even considered domestic anymore? Aren't they French or Italian or Bolivian?
  • Analoggrotto Alan's dream vehicle in the Heavens of Oz where they blow kangaroos and dingos all day long while listening to Obama speeches on repeat.
  • MrIcky Worrying about mileage is for poors.
  • ToolGuy A 'true' Volvo (pre Ford Motor Company). I would buy this and drive it for 3 years until I can get one of them 'Chinese' EV things. But I'm offering $1,850 against your $3,700 because you couldn't be bothered to pull it outside for pictures. 😉 And I will stick close to home with this one -- no road trips.In related news (Relevant and Connected!!): My new dishwasher is Swedish -- little outfit called Frigidaire, you may have heard of them. (On order, should be here in March)
  • CKNSLS Sierra SLT Let me get this straight-It's OK for GM to make cars in China and ship them here-under a Buick name. But for the Chinese to directly do it is not OK.If the Big 3 had not a deserted sedans/low end of the market they wouldn't have anything to worry about.Yea...makes perfect sense.