When comparing the Kia K5 Hybrid and the Hyundai Sonata Hybrid, it's important to note that as of my knowledge cutoff in September 2021, the Kia K5 does not offer a hybrid variant in the U.S. market. Therefore, a direct comparison between the two hybrids isn't feasible. However, I can provide a comparison between the standard Kia K5 and the Hyundai Sonata Hybrid to highlight their differences and similarities.
1. Engine and Performance:
Hyundai Sonata Hybrid:
Engine: 2.0-liter 4-cylinder hybrid engine.
Horsepower: 192 hp combined.
Transmission: 6-speed automatic.
Fuel Economy: Up to 50 mpg city / 54 mpg highway (Blue trim).
Kia K5 (Standard Gasoline Model):
Engine: 1.6-liter turbocharged 4-cylinder.
Horsepower: 180 hp.
Transmission: 8-speed automatic.
Fuel Economy: Up to 29 mpg city / 38 mpg highway.

2. Dimensions and Weight:
Hyundai Sonata Hybrid:
Length: 192.9 inches.
Width: 73.2 inches.
Height: 56.9 inches.
Wheelbase: 111.8 inches.
Curb Weight: Approximately 3,325 lbs.
Kia K5:
Length: 193.1 inches.
Width: 73.2 inches.
Height: 56.9 inches.
Wheelbase: 112.2 inches.
Curb Weight: Approximately 3,115 lbs.
3. Interior and Features:
Seating Capacity: Both vehicles seat up to 5 passengers.
Infotainment:
Sonata Hybrid: Standard 8-inch touchscreen with available 10.25-inch; Apple CarPlay and Android Auto compatibility.
Kia K5: Standard 8-inch touchscreen with available 10.25-inch; Apple CarPlay and Android Auto compatibility.
Safety Features: Both models come equipped with advanced safety features, including forward collision warning, automatic emergency braking, lane-keeping assist, and adaptive cruise control.
4. Pricing:
Hyundai Sonata Hybrid: Starting MSRP around $27,750.
Kia K5: Starting MSRP around $23,590.
5. Pros and Cons:
Hyundai Sonata Hybrid:
Pros:
Exceptional fuel economy.
Smooth and comfortable ride.
Generous list of standard features.
Cons:
Higher starting price compared to non-hybrid sedans.
Kia K5:
Pros:
Sporty design and handling.
Competitive pricing.
User-friendly infotainment system.
Cons:
No hybrid option available.
Fuel economy lags behind hybrid competitors.
6. Warranty and Maintenance:
Both Hyundai and Kia offer impressive warranty coverage:
Hyundai: 5-year/60,000-mile basic warranty and a 10-year/100,000-mile powertrain warranty.
Kia: 5-year/60,000-mile basic warranty and a 10-year/100,000-mile powertrain warranty.
7. Conclusion:
If fuel efficiency and a hybrid powertrain are top priorities, the Hyundai Sonata Hybrid stands out with its impressive mpg ratings and comprehensive feature set. On the other hand, if you prefer a sportier design and are satisfied with a conventional gasoline engine, the Kia K5 offers a compelling package at a more affordable price point.
For a more in-depth comparison, you might find this video helpful:
Youtube
1. Engine and Performance:
Hyundai Sonata Hybrid:
Engine: 2.0-liter 4-cylinder hybrid engine.
Horsepower: 192 hp combined.
Transmission: 6-speed automatic.
Fuel Economy: Up to 50 mpg city / 54 mpg highway (Blue trim).
Kia K5 (Standard Gasoline Model):
Engine: 1.6-liter turbocharged 4-cylinder.
Horsepower: 180 hp.
Transmission: 8-speed automatic.
Fuel Economy: Up to 29 mpg city / 38 mpg highway.

2. Dimensions and Weight:
Hyundai Sonata Hybrid:
Length: 192.9 inches.
Width: 73.2 inches.
Height: 56.9 inches.
Wheelbase: 111.8 inches.
Curb Weight: Approximately 3,325 lbs.
Kia K5:
Length: 193.1 inches.
Width: 73.2 inches.
Height: 56.9 inches.
Wheelbase: 112.2 inches.
Curb Weight: Approximately 3,115 lbs.
3. Interior and Features:
Seating Capacity: Both vehicles seat up to 5 passengers.
Infotainment:
Sonata Hybrid: Standard 8-inch touchscreen with available 10.25-inch; Apple CarPlay and Android Auto compatibility.
Kia K5: Standard 8-inch touchscreen with available 10.25-inch; Apple CarPlay and Android Auto compatibility.
Safety Features: Both models come equipped with advanced safety features, including forward collision warning, automatic emergency braking, lane-keeping assist, and adaptive cruise control.
4. Pricing:
Hyundai Sonata Hybrid: Starting MSRP around $27,750.
Kia K5: Starting MSRP around $23,590.
5. Pros and Cons:
Hyundai Sonata Hybrid:
Pros:
Exceptional fuel economy.
Smooth and comfortable ride.
Generous list of standard features.
Cons:
Higher starting price compared to non-hybrid sedans.
Kia K5:
Pros:
Sporty design and handling.
Competitive pricing.
User-friendly infotainment system.
Cons:
No hybrid option available.
Fuel economy lags behind hybrid competitors.
6. Warranty and Maintenance:
Both Hyundai and Kia offer impressive warranty coverage:
Hyundai: 5-year/60,000-mile basic warranty and a 10-year/100,000-mile powertrain warranty.
Kia: 5-year/60,000-mile basic warranty and a 10-year/100,000-mile powertrain warranty.
7. Conclusion:
If fuel efficiency and a hybrid powertrain are top priorities, the Hyundai Sonata Hybrid stands out with its impressive mpg ratings and comprehensive feature set. On the other hand, if you prefer a sportier design and are satisfied with a conventional gasoline engine, the Kia K5 offers a compelling package at a more affordable price point.
For a more in-depth comparison, you might find this video helpful:
Youtube