2021 Kia K5 vs. 2020 Kia Optima

2021 Kia K5 vs. 2020 Kia Optima
2021 Kia K5


2020 Kia Optima
$23,590 MSRP

Starting Price

$23,390 MSRP
180-hp 4-cylinder

Base Engine

185-hp 4-cylinder
290-hp turbo

Upgraded Engine

245-hp turbo
105.3 cubic feet

Passenger Volume

104.8 cubic feet

Available AWD

Instead of updating the Kia Optima for 2021, Kia has released an evolved version of the Optima in the Kia K5. But, how does the Optima compare to the new K5? Compare the Optima vs. K5 with Suntrup Kia South to see how this model has improved and what you can expect on your St Louis drives. Then, choose between the Kia Optima and Kia K5 when you visit Suntrup Kia South in-person or online.

Kia K5 vs. Optima: Interior Dimensions

How much has the Kia K5 improved over the Kia Optima? To see how much more space you’ll have for those long Jefferson County trips, compare the Optima vs. K5 interior dimensions.

2020 Kia Optima

  • Headroom (Front/Rear): 39.8 inches/37.8 inches
  • Shoulder Room (Front/Rear): 58.1 inches/56.4 inches
  • Hip Room (Front/Rear): 56 inches/56 inches
  • Legroom (Front/Rear): 45.5 inches/35.6 inches
  • Passenger Volume: 104.8 cubic feet
  • Cargo Volume: 15.9 cubic feet

2021 Kia K5

  • Headroom (Front/Rear): 40.2 inches/37.8 inches
  • Shoulder Room (Front/Rear): 58 inches/56.1 inches
  • Hip Room (Front/Rear): 56 inches/56 inches
  • Legroom (Front/Rear): 46.1 inches/35.2 inches
  • Passenger Volume: 105.3 cubic feet
  • Cargo Volume: 16 cubic feet


Red 2021 Kia K5 on Highway
2021 Kia K5 Cross Section


Kia K5 vs. Optima: Performance

One noticeable difference when comparing the Kia Optima vs. K5 is in their performance capabilities. With two different starting engines available, here’s what kind of performance you can expect from these two masterful sedans and their top available engines.

2020 Kia Optima

  • 2.0L turbo engine (top engine)
  • 245 hp
  • 260 lb-ft of torque
  • FWD
  • 6-speed automatic transmission

2021 Kia K5

  • 2.5L turbo engine (top engine)
  • 290 hp
  • 311 lb-ft of torque
  • FWD and AWD
  • 8-speed dual clutch automatic transmission

The Kia K5 out drives its predecessor with an estimated 0-60 mph time of 5.8 seconds, a whole second faster than the Kia Optima. Wherever you go in St Charles, you’ll drive with power and confidence behind the wheel of the Kia K5. Check out the Kia K5 mpg ratings and other performance features in more detail when you visit Suntrup Kia South.

Kia K5 vs. Optima: Technology & Convenience

Kia aims to keep you and your passengers comfortable on every drive around St. Louis. Here are some of the latest available features inside both the Kia Optima and K5:

  • Remote keyless entry
  • Automatic emergency braking
  • 8-inch touchscreen display with rearview camera
  • 60/40 split-folding rear seats
  • Dual-zone automatic temperature control
  • Bluetooth hands-free driving

The Kia K5 comes with all of the listed features as the Optima, but the Kia K5 sports a larger 12.3-inch display screen for you to monitor.

Find an Optima or K5 at Suntrup Kia South

Compare the Kia K5 vs. Optima in more detail when you visit Suntrup Kia South. Contact us to explore the K5 or Optima inventory and apply for financing to get you behind the wheel of your brand new Kia today.

New Kia K5 for Sale in St. Louis

Suntrup Kia South 38.5159372, -90.3443184.