Talk to anyone on the forums about engines and horsepower and you will get as many answers as their are users. You want something drivable and fun, some will comment. You need a widow-maker that needs to be tamed, others will say. But rarely will they put things into perspective plebs like me could understand. Keep in mind, the Roadster is a 2,400lb car with a relatively short wheelbase. Massive power would create a monster that would spend as much time eating tires as it would hunting the nearest roadside tree. As Jeremy Clarkson said “speed never killed anyone. Suddenly becoming stationairy, that’s what gets you.”
For me, I keep referring to my roadster as my 4-wheeled motorcycle – and with that comparison in mind, I want something that I can go blast around the roads on the weekend, or enjoy a more fun commute to work, but still be able to see my family at the end of the day…if that makes sense.
Below are several comparisons that I sourced through information on Car & Driver’s website on recent cars they’ve tested, and how their power-to-weight would compare to a Roadster with a given engine.
300hp Equivalent
Porsche 718 GTS 4.0
394hp / 309lb-ft torque
0-60: 3.3 seconds
MSRP: $96,850
350hp Equivalent
BMW M8 Competition
617hp / 553lb-ft torque
0-60: 2.5 seconds
MSRP: $147,995
400hp Equivalent
Chevrolet Corvette E-Ray
655hp / 595lb-ft torque
0-60: 2.5 seconds
MSRP: $108,595
450hp Equivalent
Ferrari 296 GTB
654hp / 546lb-ft torque
0-60: 2.4 seconds
MSRP: $342,205
500hp Equivalent
McLaren 720S Spider
710hp / 568lb-ft torque
0-60: 2.8 seconds
MSRP: $310,500
550hp Equivalent
Lamborghini Sian
808hp / 550lb-ft torque
0-60: 2.5 seconds
MSRP: $3,000,000
Based on this, for me, I think the sweetspot falls in the 350-400hp range. Plenty of fun for a blast around town, but restrained enough to keep my family from referring from me in past-tense.