Porsche gives downsizing the bird with 2020 718 Cayman GT4, 718 Spyder

Both receive a naturally-aspirated flat-six.

Porsche has expanded the 718 line-up with track-bred Cayman GT4 and Spyder variants. While other 718 variants downsized to a turbocharged flat-four engine, the latest variants pay tribute to the company's roots with a naturally-aspirated flat-six.

The six in question is a mid-mounted, 4.0-liter unit tuned to deliver 414 horsepower and 309 pound-feet of torque. It spins the rear wheels through a six-speed manual transmission, and a mechanical limited-slip differential. Porsche has often argued a dual-clutch transmission delivers quicker shifts and faster lap times, but it chose not to offer a two-pedal setup on these pure, driver-focused 718s. The six has an 8,000-rpm redline, and Porsche developed a sport exhaust system specifically for it.

Zero-to-60-mph times remain under wraps; that's not what either car is about. We know the GT4 has a top speed of 188 mph, and the Spyder reaches 187 mph. Of course, both cars receive a comprehensive selection of chassis and suspension modifications. Some parameters -- like the camber, toe, and the ride height -- are manually adjustable. Front brakes from the 911 GT3 keep the six's power in check. Though they look different, the GT4 and the Spyder are identical under the body.

Both 718s receive a model-specific body kit, sport seats, several square feet of Alcantara upholstery, and a short-throw shifter. They were developed with a focus on driver enjoyment, but they nonetheless offer basic creature comforts like air conditioning and a touchscreen-based infotainment system.

The 2020 Porsche 718 Cayman GT4 and 718 Spyder are on sale now starting at $99,200 and $96,300, respectively, before the company adds a mandatory $1,250 destination charge. Deliveries will begin in the spring of 2020.