Top-Rated 2018 Coupes and Convertibles in Quality

Philly Murtha | Jun 20, 2018

The annual J.D. Power Initial Quality StudySM (IQS), conducted for over three decades, is the benchmark study for owner satisfaction with new-vehicle quality. The study, which measures owner-reported problems with vehicle design and with defects during the first 90 days on the road, is based on responses from more than 75,000 verified new-vehicle owners.

To help consumers research and shop for a new vehicle, J.D. Power has developed Power Circle Ratings, based on data results that reflect and sum up IQS findings in an easy-to-use graphic format.

2018 BMW 4 Series Coupe, Convertible, Gran Coupe photo This buyer’s guide highlights the top-rated coupes and convertibles for 2018. Each of the models earns 4 or 5 out of a possible 5 Power Circles in initial quality during the first 90 days of ownership.

2018 BMW 2 Series

BMW’s smallest sporty car, redone for 2017, is offered in 2018 as a coupe or convertible and arrives with two quick powertrains that generate 248 horsepower (230i), or 335 horsepower for the nearly-track ready model (M 240i). Available all-wheel drive (AWD) provides athletic handling. The current model’s interior has been updated with stylish gloss black and chrome accents, while new colors and wheel designs are available.

The 2018 BMW 2 Series Small Premium Car receives an initial quality Power Circle Rating of 4 out of a possible 5, which is next to the best in this segment.

2018 BMW 4 Series

BMW added new engines, trims and technology to the 2017 4 Series lineup. For 2018, the 4 Series Coupe and Convertible feature stiffer suspension plus modified steering and handling. The sporty compact “Bimmer” also receives a few styling updates to front and rear and new lighting systems. Fresh exterior colors and wheel designs are available along with new premium infotainment system, heated front seats and designer leather upholstery.

The 2018 BMW 4 Series receives an initial quality Power Circle Rating of 5 out of 5 and is an award recipient in the IQS Compact Premium Car segment.

2018 Ford Mustang

The 2018 Ford Mustang Coupe and Convertible pony car has been redone with sleeker lines, a lower hood, new grille and lighting. The 2018 “resculpted beast” also features improved performance and new technology, including an expanded suite of available advanced safety systems. The V-6 has been deleted, but an EcoBoost 2.3-liter 4-cylinder engine and 5.0-liter V-8, with 6-speed manual or 10-speed automatic are offered. The 2018 Ford Mustang also can be personalized with new performance packages, fresh colors and alloy wheel selections.


The 2018 Ford Mustang receives an initial quality Power Circle Rating of 5 out of 5 and is the award recipient in the Midsize Sporty Car segment.

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