On sale this summer, the new sedan will replace the Optima Kia Motors America announced June 30 via virtual media reveal that the replacement for its midsize Optima sedan will be the K5, going on sale later this summer. The fastback-styled sedan will be sold with a choice of turbocharged four-cylinder engines, eight-speed automatic transmissions and, for the first time, an option for all-wheel drive. The K5 is such a dramatic departure [from Optima] that...