10. 2019 Mercedes-Maybach S650 Sedan
We start with the 2019 Mercedes-Maybach S650 Sedan, and there's absolutely no doubt about its output being accurate.
The S650 shares its biturbo 6.0-liter V12 with the existing AMG S65. The mill produces 621 horsepower and 738 pound-feet of torque in both applications.
Motor1.com had an opportunity to experience this engine in the S65 in 2017 and came away impressed. "At any speed in any gear, the engine pulls with reckless abandon; there’s enough grunt to pass anyone, at any time, in just seconds."
9 (Tie). 2019 Mercedes-AMG GT 4-Door Coupe
After extensive use in other models from the AMG division, there's not much reason to doubt Mercedes' claim that the 4.0-liter biturbo V8 in the AMG GT 4-Door Coupe 63S produces 630 hp. The same engine makes 577 hp in the basic 63 trim.
AMG keeps making tweaks to boost the output, and the new GT 4-Door Coupe is just the latest step in that development.
9 (Tie). 2018 Lamborghini Huracan Performante Spyder
The new Lamborghini Huracan Performante Spyder simply takes the roof off the existing coupe, so there's no reason to doubt the roadster's performance claims. They share the same 5.2-liter naturally aspirated V10 with 630 horsepower and a seven-speed dual-clutch gearbox.
8. 2018 Ferrari 488 Pista
For the new 488 Pista, Ferrari takes its existing 3.9-liter biturbo V8 and makes an extensive array of upgrades to boost the output to 711 hp, versus 660 hp in the 488 GTB. The improved mill is the company's most powerful road-going, eight-cylinder engine ever.
The changes over the version in the 488 GTB include a larger intercooler, new cams, strengthened internals, titanium connecting rods, and Inconel exhaust manifolds.
7. McLaren Senna GTR Concept
The McLaren Senna GTR at the Geneva Motor Show is technically a concept. However, it gets a spot on this list because the British brand definitely intends to build the track-oriented model.
This is also the first model on this list where we can't entirely trust the output but not for the reasons that you might expect. For now, McLaren says the Senna GTR has “at least” 825 horsepower. However, its production doesn't begin until 2019, which gives the company around a year to further develop the powerplant. By that time, the engine could be even more powerful.
6. LVCHI Venere
LVCHI is a new automaker from China that's showing the stylish Venere sedan. It has an electric powertrain producing a claimed 992 horsepower. The company thinks the model could be on the road in 2019.
The quick timeframe for production and lofty power rating, especially from a new auto brand, just doesn't seem very believable.
If you want to know more, Motor1.com's colleagues at InsideEVs have recently written about the Venere.
5. Aston Martin Valkyrie AMR Pro
The Aston Martin Valkyrie AMR Pro is very similar to the McLaren Senna GTR both in terms of its intended use and the state of development. Aston won't begin deliveries of the AMR Pro until 2020, and development will continue until closer to launch, including input from Red Bull Racing.
Aston Martin promises that the AMR Pro has "over" 1,100-horsepower from its hybrid-assisted V12. Since the company already has buyers for all of them, we can safely guess that the production model packs at least that much output.
4. Zenvo TSR-S
The Zenvo brand isn't as recognizable in the hypercar market as companies like Pagani or Koenigsegg, but the Danish firm has an impressive resumé of creations after several years on the market.
At first glance, the company's claim that the TSR-S' bi-supercharged 5.8-liter V8 produces 1,177 hp sounds too good to be true. However, this incredibly powerful mill is actually an upgraded version of its existing powerplant from the TS1 GT with 1,163 hp. By slightly improving a current engine, we can put a little more stock in Zenvo's numbers being possible.
Plus, Zenvo has been building hypercars with four-figure horsepower numbers for many years. There's not reason to believe that it can't make another one.
3. Techrules Ren RS
At this year's Geneva Motor Show, Techrules unveiled the single-seat, track-only Ren RS with 1,287 horsepower in its top trim. The powertrain allegedly combines six electric motors – two at the front axle and four at the rear – and two diesel-fueled turbines for powering the on-board generators.
The gargantuan figures and wild powertrain immediately suggest the Ren RS can't be real. However, Techrules has released photos showing the RS on track. Earlier concepts have at least been at the stage where they can go around a circuit, too.
Showing a moving test mule makes the firm's claims more credible. There's still a nagging question of whether the company can take the next step of transitioning its lofty claims into a fully functional road car.
1. Rimac C_Two
With the Concept One, Rimac proved it was able to build an electric hypercar with absolutely insane performance. At the Geneva Motor Show, the firm debuted the new C_Two with similarly incredible specs. With a model on the road, we're more likely to believe the astounding claims for the latest vehicle.
The C_Two allegedly has 1,888 horsepower and can reach 60 miles per hour in just 1.85 seconds. The impressive performance reportedly comes with a maximum driving range of 404 miles in the NEDC test.
While the powertrain numbers are on the razor's edge of being unbelievable, the tech claims are where the C_Two really strain credibility. According to Rimac, the model features Level 4 autonomous driving ability, which means the vehicle can entirely pilot itself if necessary.
Creating a fully self-driving vehicle is a project that the auto and technology industries are investing billions of dollars in. It's difficult to believe that a tiny company like Rimac somehow has a solution that much larger competitors don't.
14 / 14