Fast sedans hold a very special place in automotive history and gearheads' hearts. While many credit the 1955 Alfa Romeo Giulietta as the world's first true sports sedan, it wasn't until the mid-80s – when BMW came out with the E28 M5, and AMG built the "Hammer" – that the segment truly gained traction. The '90s exploded with German luxo barges packing massive power, and the 2000s saw the rise of the world's first 500-HP sedan courtesy of BMW's M5 E60.Sleeper sedans, however, are a very special breed of sports sedan. Their cool factor comes from the ridiculous contrast between massive power and boring, everyday looks. They've been around for as long as sports sedans themselves, blending into everyday traffic and quietly outrunning sports cars at traffic lights. But while Germans have always led the sleeper charge, the most overpowered sleeper sedan you can buy in America today is as American as apple pie. It's not a Tesla Model S Plaid, and it's definitely not a Hellcat, but it will easily leave them both in its dust – and it costs as much as a Lambo. Sleeper Sedans Are A Dying Breed In 2026 Via: Bring a Trailer For over a decade, manufacturers have been phasing out traditional sedans in favor of SUVs and crossovers. The few fast sedans that remain usually wear flared fenders, massive wheels, and giant exhaust pipes that scream 'performance' from a mile away. Take the new Audi RS5, for example, which was redesigned with dual tailpipes that look like they belong on a fighter jet rather than a family car.The market for fast sedans has become spoiled for power, too. The aforementioned RS5 pushes 630 hp (a ridiculous 180-hp bump over the 2025 model). It's gotten so bad that most AMG or Audi owners awkwardly look to the side when I tell them my A90 Toyota Supra makes "just" 340 hp, and I don't blame them.The last proper sleepers on the market include dual and tri-motor electric cars like the 1020-hp Tesla Model S Plaid, the 563-hp twin-turbo V8-powered Audi S8, and the hybridized 791-hp Mercedes-Benz S-Class AMG S63 E Performance. None of them, however, even comes close to the kind of power produced by the king of sleeper cars today, which is almost impossible to spot in everyday traffic – and even harder to hear. The Lucid Air Sapphire Is A Supercar Killer You'll Never Hear Coming Bring a TrailerThe Lucid Air Sapphire has a couple of key things going for it. The first is the fact that it's really hard to tell it apart from a regular Lucid Air – or any everyday sedan, for that matter. The second is the fact that it's still the quickest and most powerful sedan ever produced, and it's completely electric.It all started in 2013, when an ex-Tesla Model S chief engineer, Peter Rawlinson, joined Lucid as chief tech officer with a clear vision to rebrand Lucid. Fast-forward ten years, and Lucid launched the model that could hunt down the 1020-hp Tesla Model S Plaid, which had been terrorizing the streets for years up to that point – along with pretty much every supercar you can think of. A Power Figure That's Easy To Remember But Impossible To Beat Bring a Trailer The headline act is the ridiculous 1,234 hp and 1,430 lb-ft in special "Sapphire" mode, which is sent to all four wheels with the help of Sapphire-exclusive torque vectoring tech. That's more horsepower than any sedan would ever need, in a million years. The result? A 0-60 mph in 1.89 seconds and a quarter mile in 8.95 seconds at 158 mph.Even the new C8 Corvette ZR1, one of the quickest gas cars ever, trails behind in quarter-mile performance. And the Sapphire does all that while offering an impressive 427 miles of range on a single charge of its 118kWh battery pack – 59 miles further than a Tesla Model S Plaid will take you.Take it to a drag-prepped surface, and you could see 0-60 mph times as low as 1.77 seconds and up to 1.5 Gs – acceleration that some journalists have jokingly described as enough to cut bloodflow to the brain and you into G-lock. Why The Lucid Air Sapphire Is A Textbook Sleeper Car Bring a TrailerThe main ways to tell a Sapphire apart from a regular Air include the gorgeous Sapphire Blue metallic paint option and the subtly flared side fenders. More discerning gearheads will also spot the Sapphire-badged front splitter and small carbon ducktail spoiler. An aluminum panel also replaces the glass sunroof, while the whole car sits a few inches closer to the ground.Bend low enough, and you'll see it sports wider tires too, but that's about it. Everything else is hidden under the sheet metal, such as the reworked sports suspension with adjustable shocks, anti-roll bars, and massive carbon ceramic brakes. The Sapphire is the definition of a sleeper car as God intended them. It even has sporty bucket seats waiting for you inside, while the rest of the cabin looks like it belongs in a Mercedes S-Class.Bring a Trailer Most importantly, it's the only Lucid Air with a triple motor setup, and it allegedly makes way more than the advertised 1,234 hp. I like to think Lucid just felt that "1234" was the easiest number for everyone to remember the Sapphire by, which it is. The Secret To The Sapphire's Performance Lucid The Sapphire isn't just an overpowered electric muscle sedan that's only fast in a straight line – if such a thing could even exist. Instead, think of it more as a four-door tech marvel that just happens to be extremely roomy on the inside. Despite the massive 5,335-lb curb weight, it's just as at home on a track as it is on a highway, consistently leaving everyone who drives it surprised at how effortlessly it takes on corners.We have the Sapphire's torque vectoring system to thank for that. It continuously finds the exact right amount of power to send to each of the four wheels based on available traction up to 1,000 times per second. That helps explain its performance on the track and why Hagerty's Jason Cammisa described it as "the best-handling sedan in the history of the world. Or maybe the best-handling car, period."And you can't get this in any other Lucid Air trim aside from the Sapphire. In short, the Air Sapphire is an electric sedan that does it all and one that truly embodies Lucid's "Compromise Nothing" mantra – as long as you have some $249,000 to spare, which brings us to my next point. Who Buys This Car? Lucid Motors The Lucid Air Sapphire is the cream of the crop trim and sits above the 430-hp RWD Pure ($70,900), 620-hp AWD Touring ($79,900), and the 819-hp AWD Grand Touring ($114,900) versions. It's also by far the most expensive one, and it mainly comes down to its performance.In fact, the Air Sapphire is more than twice as expensive as a Tesla Model S Plaid and the new Mercedes-Benz S-Class. Heck, it even costs more than a brand-new Lamborghini Urus SE. That's for an electric sedan that's hardly going to keep its value on the used market. So, the logical question is, who is this car for?Bring a Trailer The answer is, probably someone who likes the feeling of being rear-ended at a press of the gas pedal, or someone who wants a really fast and practical EV but is simply too cool for a Tesla Model S Plaid (or not the biggest fan of Elon). It's also a car for someone with deep enough pockets to splurge 250 grand on a sedan that will lose a new F-150's worth of value every year due to depreciation.I'm not exaggerating. Looking at recent Sapphire sales on online marketplaces, several 2023 and 2024 Sapphires recently traded hands for under $200,000. Here's one that sold for exactly $200,000 the same year it was bought for $250,000, and another one that traded hands for $175,000 on Bring a Trailer earlier this year. Both of those were in near-perfect condition.In fact, judging by what's available on the market right now, the Sapphire could very well be a $100k used car in just a year or two. But considering the Sapphire is so over the top anyway, a regular two-motor Sapphire will scratch most people's luxury EV itch just fine – and for a fraction of the price. How The Sapphire Stacks Up To The World's Most Powerful Sedans Lucid MotorsThe best way to put the Sapphire's insane performance into perspective is to compare it with other overpowered sedans on the market. Its most direct competitors are the Tesla Model S Plaid and Porsche Taycan Turbo GT – both fully electric and pushing four-figure horsepower. The Model S Plaid is quick, but it still trails a bit behind the Sapphire, both to 60 mph and over the quarter-mile, which Tesla advertises at 9.23 seconds on a prepped track.Porsche The Taycan Turbo GT is where it gets tricky. With the new Weissach package, which sheds 165 lbs of weight and makes the Taycan more track-ready, the Porsche actually matches the Sapphire's best 1.89-second 0-60 mph run in independent tests, if not beats it – depending on who you ask. The fastest 1/4 mile time for the Taycan seems to be 9.2 seconds, which is still a bit short of the Sapphire's 8.95-second official 1/4 mile claim and its 9.1-second record in other independent tests.However, the Taycan is neither cheap nor a proper sleeper sedan. A 2026 Taycan Turbo GT with the Weissach package will also set you back $245,950, and its futuristic supercar-esque design grabs you by the eyeballs from a mile away. The Lucid, on the other hand, slides completely under the radar. The Most Powerful Hybrid Sedan Mercedes-AMG The discrepancy becomes especially massive when comparing the Air Sapphire to hybrid and pure gas-powered sleepers. The most powerful non-electric sedan in the world used to be the 807-hp Dodge Charger SRT Hellcat Redeye with the Jailbreak package. Pushing power to the rear wheels only, this ultimate Charger is good for a 0-60 mph in 3.6 seconds and a 1/4 mile in 10.6 seconds.Currently, however, the title of the most powerful non-EV sedan goes to the plug-in-hybrid 791-hp Mercedes-Benz S63 E Performance. This sedan will beat a Lamborghini Huracán to 60 mph, completing the run in just 2.6 seconds in real-world testing and covering the 1/4 mile in 10.8 seconds. The Most Powerful Pure Gas Sedan Via: Bring a Trailer When it comes to pure gas-powered sedans, the Cadillac CT5-V Blackwing remains the top contender in 2026. Its combination of a supercharged 668-hp V8 engine and manual transmission makes it the last sedan of its kind, but it can't keep up with the fastest hybrids or electric cars today in pure speed.All the sedans mentioned above are sold and road-legal in America, but it's important to know that there's also another overpowered sedan out there with even more power than a Lucid Air Sapphire. Yes, seriously. The World's Most Powerful Sedan You Can't Buy In America (Yet) Xiaomi That title belongs to the Xiaomi SU7 electric sedan. Produced by a smartphone company, the SU7 made headlines last year when it demolished the Porsche Taycan Turbo GT's lap record around the famous Nurburgring racetrack. It lapped the "Green Hell" in a staggering 6 minutes and 46 seconds – over 20 seconds quicker than the Taycan's record, which seemed unbeatable at the time, and over 15 seconds quicker than what Rimac managed with its 1914-hp Nevera electric supercar. To make things worse for the Porsche, the SU7 did so in just one lap and on a damp track.Helping the SU7 to that kind of performance are three 570-hp/468 lb-ft electric motors pushing a combined 1,526 hp to all four wheels! It's wild looks disqualify it as a sleeper, and with a 0-60 advertised at 1.97 seconds, it's technically still not quicker than a Sapphire, but it's pretty darn close. But what's slightly terrifying for EV brands in America is that Xiaomi has already started selling these 1526-hp sedans for the equivalent of $73,000 in China since March 2025.Sources: Lucid, Classic.com, Car and Driver, Bring a Trailer, Cars & Bids.