# Hyundai Tau engine

The Tau τ is a family of gasoline V8 engines produced by the Hyundai Motor Company. It replaced the Omega engine line.

## Tau MPi

Petrol engines :
| Model | Engine code | Power at rpm | Torque at rpm | Compression ratio |
| 4.6 Tau MPi (366PS) | G8BA | 366 PS (269 kW; 361 hp) at 6500 | 44.8 kg⋅m (439 N⋅m; 324 lbf⋅ft) at 3500 | 10.4:1 |
| 4.6 Tau MPi (390PS) | G8BA | 383 PS (282 kW; 378 hp) at 6500 (Regular) 390 PS (287 kW; 385 hp) at 6500 (Premium) | 44.8 kg⋅m (439 N⋅m; 324 lbf⋅ft) at 3500 (Regular) 46 kg⋅m (451 N⋅m; 333 lbf⋅ft) at 3500 (Premium) | 10.4:1 |
| 5.0 Tau MPi | G8BB | Premium fuel: 400 PS (294 kW; 395 hp) at 6400 | 51 kg⋅m (500 N⋅m; 369 lbf⋅ft) at 3500 | 10.4:1 |

### Specifications

4.6 Tau MPi for the Genesis' 4.6L Tau V8 engine:
   * Displacement (bore x stroke): 4.6 L (4,627 cc) (92 mm × 87 mm (3.62 in × 3.43 in))
   * Block material: High pressure die casting aluminum block
   * Cylinder head material: Aluminum
   * Valvetrain: Dual Over Head Cam (DOHC)
   * Valve timing: Continuous variable valve timing
   * Variable induction system
   * Fuel delivery: Multi-port fuel injection
   * Recommended fuel: Premium Unleaded, though it can run safely on regular gasoline with reduced performance

### Application
#### 4.6 Tau MPi

* 2008–2009 Kia Mohave/Borrego
* 2008–2012 Hyundai Genesis
* 2009–2011 Hyundai Equus
Hyundai Motor Company has also shown a supercharged version of the 4.6 Tau MPi engine at 2008 SEMA show, and later 2009 Chicago Auto Show. This engine was equipped with a supercharger and cylinder deactivation technology to produce an estimated 460 hp (343 kW) while returning better fuel economy.

## Tau GDi
### First version (2012–2014)

The Tau GDi uses gasoline direct injection.
Petrol engines :
| Model | Engine code | Power at rpm | Torque at rpm | Compression ratio |
| 5.0 Tau GDi | G8BE | 430 PS (316 kW; 424 hp) at 6400 (Regular) 435 PS (320 kW; 429 hp) at 6400 (Premium) | 52 kg⋅m (510 N⋅m; 376 lbf⋅ft) at 5000 | 11.5:1 |

#### Specifications

5.0 Tau GDi for Equus' 5.0L Tau V8 engine:
   * Horsepower: 429 hp (320 kW)
   * Torque: 52 kg⋅m (510 N⋅m; 376 lbf⋅ft)
   * Displacement (bore x stroke): 5.0 L (5,038 cc) (96 mm × 87 mm (3.78 in × 3.43 in))
   * Compression ratio: 11.5:1
   * Block material: High pressure die casting aluminum block
   * Cylinder head material: Aluminum
   * Valvetrain: Dual Over Head Cam (DOHC)
   * Valve timing: Dual-Continuous variable valve timing(D-CVVT)
   * Variable induction system
   * Fuel delivery: Gasoline direct injection / Electronic fuel injection
   * Recommended fuel: Premium Unleaded, though it can run safely on regular gasoline with reduced performance

### Second version (2015–2021)

Updates to the 2015 Genesis 5.0 Tau V8 included:
* Bump in compression ratio from 11.5:1 to 11.8:1
* Optimized intake runner length
* Enhanced timing chain for reduced friction and NVH
* Low-torque exhaust manifold
* Upgraded multiple-injection mapping
* Dual Continuously Variable Valve Timing (D-CVVT), a tuned variable induction system, and low-friction coatings on piston skirts
* Improved Low-end response along with better efficiency and NVH
| Model | Engine code | Power at rpm | Torque at rpm | Compression ratio |
| 5.0 Tau GDi | G8BE | 413 PS (304 kW; 407 hp) at 6000 (Regular) 425 PS (313 kW; 419 hp) at 6000 (Premium) | 51.4 kg⋅m (504 N⋅m; 372 lbf⋅ft) at 5000 (Regular) 53 kg⋅m (520 N⋅m; 383 lbf⋅ft) at 5000 (Premium) | 11.8:1 |

### Application

* 2016–2020 Genesis G80 (DH)
* 2015–2021 Genesis G90 (HI)
* 2011–2015 Hyundai Equus (VI)
* 2011–2016 Hyundai Genesis
* 2012–2021 Kia K9

## Awards

The 4.6 Tau V8 Engine was named to the Wards 10 Best Engine Awards for 2009 and 2010. The Tau V8 received the award due to the engine's "velvety power delivery, competitive performance, and attainable price-- all of which epitomize the Korean auto maker's drive for world-class engineering", as quoted by Forbes. This was Hyundai Motor Co. Ltd. first appearance on Ward's 10 Best Engines list. The 5.0 Tau Engine was also named in the same awards for 2011.