2029 Ford Mustang Mach-4 Sedan: Everything We Know About the Next Member of the Mustang Family
Ford’s Mustang stable isn’t done growing, and this four-door version is the next logical step.
What It Is
At this point, it’s less a rumor and more a waiting game. Ford has made it clear in both private meetings and on-the-record interviews it intends to get back into making cars other than the Mustang coupe. In other words, the company wants to extend the “Mustang family,” as executives call it. A four-door Mustang sedan concept has already been shown to dealers earlier this year, and the company trademarked the name “Mach-4,” which follows the Mustang Mach-E naming convention.
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Why It Matters
The whole “Mustang family” thing isn’t new, either, and the Mach-E was never meant to be a one-off. Ford sees the Mustang and Bronco not as individual models anymore but as subbrands ripe for expansion. That’s why there’s a little Bronco Sport and an electric Mustang Mach-E. The Mach-4 is how Ford will continue to grow the Mustang subbrand. It’s also how Ford gets back into building sedans without having to spend too much money or build (or rebuild) a new brand from scratch.
On the first point, modifying the existing S650 Mustang chassis, while not cheap, will cost less than engineering an all-new rear-drive car platform. Ford execs want this program to be cost-effective, and working with what you have is generally cheaper. Figuring out how to stretch the unibody will take a lot more than sawing the car in half and adding metal in between, but ideally, it’ll be less work than starting from nothing. If that plan pencils out, it will also help get the car to market sooner.
On the second point, the Mach-E already proved most customers care more about looking cool than preserving the sanctity of the Mustang name. The EV crossover regularly outsells the gas-powered coupe by a wide margin, and the Mustang name and looks were always intended to increase its appeal, which is precisely what happened. Ford plans to pull the same trick twice with the Mach-4 sedan. Plus, people already know what a Mustang is, so the marketing department doesn’t have to dust off an old, forgotten nameplate or invent a new one and then try to convince buyers to take a chance on it.
Platform and Powertrain
We’re confident the Mach-4 will be a modified Mustang coupe. The Mustang already has four seats, so two more doors and some rear legroom are all it really needs here. While it’s possible the Mach-4 could herald the coming of a next-generation Mustang platform the coupe would also move to, we think it’s unlikely given everything Ford execs have said about keeping costs down. It’s also worth remembering that the existing S650 platform is just an evolution of the old S550 one, not an all-new bit of engineering. It’s possible that when Ford updated the S550 to the S650, it baked in some of what would be needed to do a sedan.
Further toward keeping costs down, we don’t expect the powertrains to change. That means the 2.3-liter turbo four-cylinder and 10-speed auto is likely to be the standard setup, with the 5.0-liter V-8 optional and paired with either the 10-speed auto or six-speed manual.
Wait, do we really think Ford would do a V-8 sedan with a manual transmission? Yes. The V-8 is a lock as far as we’re concerned now that Dodge has confirmed the Charger will get a V-8. A manual transmission option will give the Mach-4 a unique selling proposition that Dodge can't currently match. Because the V-8 and manual transmission combination is already engineered for the Mustang platform, the incremental cost of emissions certification, calibration, and crash validation in the revised bodyshell should be manageable.
Estimated Price: $37,000 (base), $50,000 (V-8)
Expected On-Sale Date: Fall 2028
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Were you one of those kids who taught themselves to identify cars at night by their headlights and taillights? I was. I was also one of those kids with a huge box of Hot Wheels and impressive collection of home-made Lego hot rods. I asked my parents for a Power Wheels Porsche 911 for Christmas for years, though the best I got was a pedal-powered tractor. I drove the wheels off it. I used to tell my friends I’d own a “slug bug” one day. When I was 15, my dad told me he would get me a car on the condition that I had to maintain it. He came back with a rough-around-the-edges 1967 Volkswagen Beetle he’d picked up for something like $600. I drove the wheels off that thing, too, even though it was only slightly faster than the tractor. When I got tired of chasing electrical gremlins (none of which were related to my bitchin’ self-installed stereo, thank you very much), I thought I’d move on to something more sensible. I bought a 1986 Pontiac Fiero GT and got my first speeding ticket in that car during the test drive. Not my first-ever ticket, mind you. That came behind the wheel of a Geo Metro hatchback I delivered pizza in during high school. I never planned to have this job. I was actually an aerospace engineering major in college, but calculus and I had a bad breakup. Considering how much better my English grades were than my calculus grades, I decided to stick to my strengths and write instead. When I made the switch, people kept asking me what I wanted to do with my life. I told them I’d like to write for a car magazine someday, not expecting it to actually happen. I figured I’d be in newspapers, maybe a magazine if I was lucky. Then this happened, which was slightly awkward because I grew up reading Car & Driver, but convenient since I don’t live in Michigan. Now I just try to make it through the day without adding any more names to the list of people who want to kill me and take my job.
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