Let’s get the big digits out of the way: Rimac claims the C_Two, the follow-up to the Concept_One supercar, will have 1888 horsepower, 1696 lb-ft of torque, and a top speed of 258 mph. We’re told it also can bolt from zero to 60 mph in 1.9 seconds, cover a quarter-mile in 9.1 seconds, and can travel 404 miles on a charge (on the New European Driving Cycle). The most recent Concept_One boasted 1207 horsepower, 1180 lb-ft of torque, a 221-mph top speed, a zero-to-60-mph time of 2.4 seconds, and 205 miles of range. So it’s obvious the Croatian company has been hard at work, but there’s a much smaller number with just as much importance: 150, which is the number of cars Rimac hopes to build for actual customers. If the Concept_One was just a demo, the C_Two is the debut single. The C_Two made its debut at the Geneva auto show. The car was built from the ground up just outside Zagreb, Croatia. The design, which also was done in house, takes an evolutionary approach but has a new level of polish that makes it seem like a new car. It maintains the concept’s key distinguishing features, such as the body-length side pocket and the shape of the headlights (which now have 58 LEDs), but also adds new elements such as dihedral doors, an advanced rear wing, and aerodynamic wheels that one might expect to see on a hybrid.

Rimac bills the C_Two as a grand-touring hypercar that is meant to blend track capability with comfortable road manners. Part of...