Jaguar XFR-S Sportbrake - 4.8 secondsHow many times has the term "unicorn car" been passed around? There are countless cars worthy of that moniker, and the Jaguar XFR-S Sportbrake is definitely somewhere on that list. Not only is it a station wagon from Jaguar — which has never had a particularly easy time selling wagons to any market — but it's also a wagon with a supercharged V8 making 542 hp, allowing it to reach 60 mph in just 4.6 seconds.It may not seem all that fast by modern standards and modern AWD performance wagons, but for a RWD-only wagon built a decade ago, that's a seriously impressive number. That's not even touching the XFR-S Sportbrake's top speed of 186 mph, in contrast to most of its competitors which were often limited to 155 mph. This being a wagon, of course, the XFR-S Sportbrake was also more practical than its sedan counterpart, with up to 48mm of extra headroom and an expansive max cargo volume of 59 cu ft. Jaguars have always been a hard sell, and combining that badge with a high-performance wagon — which is a low-volume type of vehicle anyway — ultimately caused the XFR-S Sportbrake to flop. It was also never officially sold in North America, which is a shame.Audi RS4 Avant - 4.1 secondsAfter decades of fans clamoring for it, Audi finally began selling its flagship fast wagon, the RS6 Avant, in North America. Sadly, the smaller RS4 Avant did not make the cut, so it remains forbidden fruit for American buyers. The current RS4 Avant is a very impressive performance car despite using only a 2.9-liter turbo V6. Thanks to AWD and a healthy 444 hp, the RS4 Avant can rocket to 60 mph in just 4.1 seconds.The Quattro AWD system not only ensures supreme all-weather stability and capability, but also pin-sharp handling. Sure, most of the competitors now offer AWD, too, but the RS4 Avant was the only one to offer exclusively AWD for the longest time. It also has another feature that most of the competition doesn't really offer: an understated design.While the new BMW M3 Touring is unabashedly bold, the RS4 Avant is very understated. In fact, to the untrained eye, it just looks like any other A4 Avant you might see parked outside a high-end condo in Central Europe. That's, of course, until it beats you in a drag race. Cadillac CTS-V Sport Wagon - 3.9 secondsWhile the Dodge Magnum SRT8 didn't win the hearts of many fast wagon fans, the Cadillac CTS-V Sport Wagon certainly did — even if most of them didn't buy it. As Cadillac was getting serious about dethroning the European manufacturers in the fast wagon fighting ring with the second generation CTS-V sedan and coupe, it also put together a Sport Wagon. The 6.2-liter supercharged V8 under the hood allowed the CTS-V Wagon to reach 60 mph in just 3.9 seconds.Remember, that's 3.9 seconds to 60 mph in a relatively large RWD-only station wagon. The LSA V8 under the hood of the CTS-V Wagon was boosted by an Eaton TVS supercharger for a total output of 556 hp and 551 lb-ft of torque. It also allowed the CTS-V Wagon to reach a top speed of 185 mph, whereas most of its competitors were capped at 155 mph. The CTS-V Wagon also offered a six-speed manual transmission.Despite seeming like a dream American muscle wagon, the CTS-V Wagon simply couldn't keep up. Not because of a lack of trying, but because North America never really fell in love with the fast wagon. This was also true of the Coupe version, and as a result, Cadillac would never revisit the alternate body styles after this generation. However, all this has meant that the CTS-V Wagon's depreciation curve is basically flat.Mercedes-AMG E63 S Wagon - 3.3 secondsBack in 2017, Mercedes-AMG released the ultimate expression of the fast wagon: the AMG E63 S Wagon. Powered by a hand-built 4.0-liter twin-turbo V8, the E63 S puts out 603 hp and 627 lb-ft of torque, which powers all four wheels.As you'd imagine, this gave the E63 S Wagon some serious shove. Despite weighing over 4,700 lbs, the E63 S Wagon completed the sprint to 60 mph in just 3.3 seconds. That means that, despite having five roomy seats and the option of a basket to hold certain bottled items in the trunk, the E63 S Wagon was faster to 60 mph than a Lexus LFA.It's a shame that it's highly unlikely we will ever see another V8-powered Mercedes wagon again, but at least we can say, with confidence, that Mercedes gave the proven AMG wagon formula a proper send-off with the E63 S.Porsche Panamera Turbo S E-Hybrid Sport Turismo - 3.0 secondsQuite a mouthful of a name, but then this is quite the handful of a car. Before the Taycan came along, the Porsche Panamera Turbo S E-Hybrid was a powerhouse of a luxury car. Thanks to its 690 hp plug-in hybrid V8 powertrain, the heavy Panamera Turbo S E-Hybrid Sport Turismo can sprint to 60 mph in just 3.0 seconds.That's impressive performance on its own, but then you remember the other parts of this car's name, and the deal gets even sweeter. For one thing, this is the E-Hybrid, which means you can achieve some relatively decent fuel economy figures if you're careful with your right foot and use the hybrid system correctly. It's also the Sport Turismo, which means it's not only more practical and spacious, but it's also what a lot of people claim the Panamera always should have been.Despite the Panamera Sport Turismo seeming like the ultimate wagon — especially equipped like this — no one except the most die-hard fast wagon fans really fell head over heels for it. For the new fourth-generation car that Porsche revealed recently, it's back to sedan-only.