Our friends at Hagerty know a thing or two about cars and really love talking about concept cars of every era, but the 1990s have a special place in their heart. Read on and tell us which one is your fav and why in the comments section below.

It was a good decade for automotive diversity, especially for enthusiasts: SUVs were emerging as a hot new segment, true, but none of them purported to be a coupe or track star. Sport sedans thrived. So did hot hatches. The Miata debuted in 1989, kicking off the roadster craze. Chrysler was, for most of that decade, just Chrysler—not some confusing multinational conglomerate with a name that no one remembers.

Even the automotive ideas that didn’t make production had pizzazz—in a few cases, as you’ll see below, perhaps a little too much pizzazz. We’ve covered ’90s concepts before, but after a spin through the treasure trove that is Alden Jewell’s catalog of car brochures on Flickr, we decided it was time to focus on the concept cars from the U. S. of A., rather than the European contingent that dominated that last list.

Step back in time with us to an era when Buick was thinking of wild sedans, Pontiac was still cool, Mercury … existed, and Dodge was high off the Viper.

1999 Buick Cielo

If you thought Buick’s newest concept car was unorthodox, prepare yourself: The Cielo is much, much more out-of-the-box. (Despite that throwback grille texture, which is very Y-Job.) A four-door convertible, with retractable headlights and voice-operated doors? You’d never know this thing was based on a highly modified Regal GS. The top, complete with its rear glass, stowed beneath a panel at the back thanks to a cable system hidden in the two arches that frame the “roof.” Power came from a supercharged 3.8-liter V-6 making 240 horsepower.

Judging by the much tamer concept of the same name that Buick showed off the following year—and marketed as a possible limited edition—the automaker thought the convertible four-door idea had legs. In Buick’s words, the Cielo “proves just how broad and flexible and contemporary the idea of a premium family car really is.” Little did Buick know that, 15 years later, the only premium family car the people would want was an SUV …

1997 Mercury MC4

Motortrend got rather excited about the MC4 when it debuted in 1997: “The MC4 is for Mercury what the Viper Roadster was for Dodge nine years ago.” Yes, it was far more interesting to look at than the blob-like Mystique or the softly contoured Mountaineer … but no one knew that, 13 years later, Mercury would stop producing vehicles, its sales cannibalized by parent company Ford.

In 1997, however, Mercury’s star shone far brighter. The MC4 wore the edgy, minimalist look characteristic of Ford’s New Edge design language, initiated by the GT90 concept in 1990 and most familiar to folks on the 1999 Mustang. A trapezoidal grille and emphasized wheel arches are common to both that Mustang and the MC4, which actually started life as a V-8–powered ’96 Thunderbird. Unlike the T-Bird, the Mercury concept boasts four doors and a rear cargo area accessed by a pair of gullwing doors. It had style, space, and, of course, a healthy dose of tech that hadn’t quite been readied for production: video cameras instead of side- or rearview mirrors, nickel-chrome plate bedazzling the interior, and heated and cooled cupholders.

1997 Pontiac Rageous Concept

In 1997, Pontiac had four-door cars, and it had V-8–powered cars, but it didn’t have any V-8–powered, four-door cars. The Rageous, with its 350-cubic-inch small-block and vestigial set of rear doors, aimed to fix that. It could carry four people, but the trunk was accessed via a top-hinged hatch, making this more of a hatchback than a sedan. The Rageous had a six-speed manual transmission and a heavily vented, pointy schnoz that put that of the contemporary Firehawk to shame.

1994 Dodge Venom

If the Dodge Venom reminds you of a Neon, you’re on the right track: This 1994 concept was built on a version of the Neon’s platform. Unlike that compact, however, the Venom was rear-wheel drive. Compared to the sportiest Neon, the SRT-4, the Venom boasted an iron-block six-cylinder engine with 24, rather than 16, valves, and more power: 245 rather than 215 horses. The Venom looked like the perfect little brother to the Viper, which it honored with that side-scoop and squinty headlights atop a four-section grille. The concept even made the cover of Car and Driver‘s March 1994 issue, accompanied by the question: “Dodge’s pony car of the future?”

We wish such an affordable, spunky two-door had made production: Dodge wouldn’t have a direct competitor to the Mustang and the Camaro until the Challenger, which hit the streets 14 years later.

1995 Chevrolet El Camino SS Concept

It may remind GM fans of a Holden, but the El Camino SS Concept ute is a GM B-body at its core. GM’s Advanced Vehicle Development Center in North America built this ute out of a Caprice station wagon in just 16 weeks, grafting onto that people-hauler the nose of an Impala SS. Many of the steel body panels were made by hand. Power came from a 300-hp version of the LT1 V-8 found in the Corvette and the Impala SS (in different tunes) and was channeled to the rear wheels via a 4L60E Hydramatic transmission. Unfortunately, the platform that gave it birth spelled its doom: GM killed the age-old B-body at the end of 1996. RIP.

1994 Plymouth Expresso Concept

Would you believe us if we said this was a Plymouth? Maybe not, because the Expresso is more interesting than anything Plymouth made in the ’90s … until the Prowler arrived for the 1997 model year, at least. (That retro-mobile debuted in concept form the year before the urban runabout Expresso debuted.) The Expresso was built on the shortened frame of a Neon, to be sold under both the Dodge and Plymouth brands, and used the compact’s 2.0-liter four-cylinder to power its front wheels.

The four-door bubble would never reach production, but its name stuck around in the Plymouth lineup as a trim package on the Neon, the Voyager, and the Breeze. Be prepared to explain yourself if you mention this concept in front of a coffee snob: This weirdo’s name really is EX-presso, not Espresso. The proper pronunciation would be too … well, proper. For the Silo, Grace Houghton/Hagerty.